Fashion news: Rihanna bares all for skincare!

Welcome to the weekly fashion round-up, where we bring you the latest on supermodels, style, designers and everything in-between!

Which celeb's ad was banned from television for being too steamy? Which supermodel removed her underwear at an Oscars party?

Here's the lowdown on the latest fashion news!

Rihanna bares all in the name of skincare

Rihanna has posed naked for a skincare brand.

The Bajan chart star bared all for Nivea's 100 Years Skincare for Life campaign, reports the Mirror.

Two of her tattoos are visible in the first promotional shot. The 23-year-old has hinted she may have more, claiming recently on Twitter that she has "tattoo fever".

The pop princess is also the latest celebrity to appreciate Victoria Beckham's fashion line.

"I love Victoria's line, it's so feminine and chic," the Daily Star quoted her as saying.

"Really sexy, really, really tailored. That's what she is. She has put a lot of effort into it," she added.

With beautiful young competitors like Rihanna constantly hogging headlines, Britney Spears is fighting to regain her crown by revealing her glamorous side in her latest photoshoot.

The singer looks stunning in the new issue of US fashion magazine V, reports the Daily Mail.

Fashion photographer Mario Testino took the sizzling shot.

The 29-year-old star posted the picture on her official Twitter page, saying: "I HEART Mario Testino and V Magazine. Mag comes out tomorrow."

In the mag, the star talks about her comeback with new album Femme Fatale, her seventh.

And of course, Madonna is also in the running to keep on top of Britney, Rihanna and other popsters half her age. She is said to have embarrassed her daughter Lourdes on the red carpet at the Vanity Fair Oscars party with her bottom-revealing attire.

The singer, 52, wore a black leotard and a few scraps of lace, and a mortified Lourdes, 14, was heard pleading, "Mum, do you have to?!", every time the singer struck a pose and stuck her behind out for the cameras.

In what looked like an attempt to shame her mother into being less shameless, Lourdes was also heard berating her.

"But you tell me to behave like a grown-up," the Daily Mail quoted Lourdes as saying.

The singer, who attended the bash at the Sunset Tower Hotel in West Hollywood, Los Angeles, completed her outfit with fishnets and black platform stilettos.

Lourdes, meanwhile, was wearing a tiny Aztec-inspired print mini-dress, thought to be from the fashion range she's launched with her mother.

The Tonight Show correspondent Ross Matthews went from celeb to celeb present at the bash, asking them to contribute something to Leno's gift bag.

And Klum offered her underwear.

"I don't have a lot in here that I can give you," the New York Daily News quoted the model as saying while looking through her clutch.

"Oh, you can have my underwear. Wait, do you want my underwear?" she said.

And with her husband, Seal, nowhere in sight, Klum began to wiggle out of her panties and placed them in Ross' bag.

In more Oscars news, actress Joan Collins had to be taken out of the Vanity Fair post-Oscar party in an ambulance after the tight dress she wore made her woozy.

Collins, 77, who joined Graydon Carter's viewing party and dinner at Hollywood's iconic Sunset Tower Hotel, started feeling faint and rested on a sofa in the hotel's Tower Bar.

Her husband, Percy Gibson, then called for an ambulance and the actress was discreetly helped out of the back of the hotel.

"We had been there for seven hours, and I started feeling dizzy. I tried to get some air, but I felt really faint," the New York Post quoted Collins, who recently completed an acclaimed run at Feinstein's at The Regency, as saying.

"I wanted to leave in our limo, but Percy decided to call an ambulance. We went to the hospital, and they did all the tests before the doctors told me I was absolutely fine and released me."

"The truth was, I made the wrong decision to wear a very tight dress, and had something rather like a Victorian swoon. The good news is, I am in good health and feel fine today," she added.

Fashion comes first for the venerable actress, looks like!

Lady Gaga made her debut as a runway model at the Paris Fashion Week.

The 24-year-old singer lit up the catwalk wearing what looked to be a lampshade on her head, reports the Sun.

She was modeling for French designer Thierry Mugler's show and wore a number of different eye-catching outfits.

The clothes were from her stylist Nicola Formichetti's womenswear collection and the event was streamed live on Facebook.

Formichetti, responsible for many of the pop diva's most memorable costumes, including the 'meat dress', won the Isabella Blow Award for Fashion Creator at the British Fashion Awards in London in December.

The show also marked the first airing of one of Gaga's new tracks.

Earlier, the singer wrote on Twitter how excited how she was about the show.

"I'm making my debut as a runway model, walking in the Mugler Paris Fashion show," she tweeted.

"I directed the show music, and will be previewing new song Government Hooker," she added.

Gaga's sojourn to Paris also saw her arrive at one of the city's most prestigious restaurants, Maxim's, wearing a see-through all-in-one leopard print catsuit.

Post her ramp stint, she stopped at the restaurant for dinner, the Daily Mail reported.

She ignored the sober nature and dress code of the place, which is known for its formality and carrying a glass of champagne, roared and snarled as she walked in on platform, heel-less boots.

Maxim's, which is now owned by fashion designer Pierre Cardin, has over the years been a regular haunt for Jean Cocteau, Edward VII, Marcel Proust, Maria Callas, the Duke and Duchess of Windsor, Barbra Streisand and Barbara Hutton.

Also at Paris Fashion Week and making her big comeback to the world of fashion was Miranda Kerr.

The supermodel showed off her post-baby body walking the runway -- just two months after giving birth to a son.

The 27-year-old stepped on the catwalk for two Balenciaga shows in a black draped dress with leather details at the fashion fest in the City of Lights, displaying her signature svelte shape after giving birth to Flynn on January 6.

Her husband, English actor Orlando Bloom, sat front-and-centre alongside Vogue editor Anna Wintour to cheer on his wife.

"Miranda was excited to be back on the catwalk in Paris...and loved every minute of it," News.com.au quoted a statement on her blog as saying.

While Miranda is back to her pre-baby weight, sex symbol Megan Fox's new pictures show her looking skinnier than usual.

The actress stripped down to her underwear to advertise Emporio Armani's lingerie and in one pose she hunches over to show a concave stomach, while her bones are clearly visible through her back, reports the Daily Mail.

Wearing minimal makeup, the star is indisputably beautiful, but the image is a stark one.

Megan has previously stripped to her underwear to advertise Emporio Armani's lingerie -- but the tables have been turned somewhat in her latest advertising campaign for the fashion house's fragrance Armani Code.

The Jennifer's Body actress has just been announced as the new face of the scent and has shot a sultry television advert which sees her pose with a naked man while she remains relatively covered up.

In sizzling scenes, the 24-year-old -- sporting a sleek black bob -- cavorts with the hunky male model on a rooftop overlooking the Los Angeles cityscape at night, reports the Daily Mail.

At first, the man is wearing a tuxedo, but, as the city lights twinkle below, he soon strips off and Megan is also seen naked wrapped in a black sheet showing just her back to the camera.

According to experts, Armani Code Pour Femme has notes of orange, orange blossom, ginger, pear sorbet, jasmine, vanilla, woods and lavender honey.

Armani meanwhile says the scent is a "sexy, femme fatale kind of perfume -- a woman's mysterious code of seduction revealed."

Towards the end of the clip Fox appears topless, wearing just a pair of skin-tight white Armani Jeans as she seductively leans across the back of a sofa.

The full version of the sexy TV advert is due to air in the next few weeks and advertises both the underwear and jeans spring 2011 collections.

Hendricks, 35, has been topping best-dressed lists at awards ceremonies since last year's Emmys, and her popularity marks a return to old school preferences when curvy was in and hourglass figures were ideal.

The demand for silhouette clothes at Debenhams increased by 225 percent last year.

"It looks like big busts, big hips and narrow waists are on their way back," the Daily Mail quoted Debenhams spokeswoman Michelle Dowdall as saying.

"We're returning to an age when all women looked like Jane Russell, Ava Gardner and Rita Hayworth."

"It's bad news for stick-thin models -- but great news for ordinary women on the street with healthy, fuller figures," she stated.

Debenhams expects sales of pencil skirts, fitted jackets and strapless dresses to increase, which is a major shift from today's boyish, androgynous styles.

Deep V-neck sweaters, tight fitting blouses -- and good underwear hiding bumps and lumps -- will also become wardrobe staples.

"We're watching this development very closely. If hourglass figures are going to return -- and current evidence suggests that they are -- then we need to begin planning for that major change now," Dowdall added.

In more bootylicious beauty news, singer Beyonce Knowles, who recently launched her second fragrance, insists she has no regrets over the steamy commercial promoting it.

The advertisement was deemed unsuitable for television, but the Crazy in Love hitmaker admits that she found the furore over the video "funny".

The steamy clip for Beyonce's Heat fragrance, which features the singer lying in a bathtub and seductively stroking her chest, was banned by officials at the Advertising Standards Authority in November (10), reports the Daily Star.

She told Cosmopolitan magazine, "I wasn't annoyed, I thought it was funny. Personally, I don't think my ad was any more crazy sexy than other ads out there -- I loved it, despite whatever anyone else thought."

"It was based on a really hot George Michael video and yes, it was sexy, but then you have to think about what you're doing. It was for my fragrance and I believe a wonderful fragrance brings out the sex appeal in a woman."

"That was what I was trying to express. I don't regret it."

Beyonce also told the magazine that she never leaves the house without wearing her favourite scent. "I feel like fragrance is one of the most important accessories a woman can have -- it's sexy, it says something, and it's that final touch, like putting on a gorgeous pair of stilettos,"

"One of the things I remember from being a little girl is how I loved watching my mother getting ready to go out and she'd spray on her perfume. It was this gorgeous blast that would linger in the room after she'd gone and it would remind me of her. I thought it was so sophisticated and glamorous, so feminine and sexy," she added.

"To me, even if you are dressed to kill and everything is looking fabulous, you are still not done without that touch of fragrance. It's the cherry on top of the cake."

Actress Courteney Cox's bustier new look has sparked rumours that she has gone under the knife. The former Friends star showed off her bikini body while filming scenes for Cougar Town in Hawaii.

And it looks like the green two-piece was either boasting some uplifting padding, or the star has taken more drastic measures to boost her bust, reports the Daily Mail.

Either way, her noticeably fuller curves were catching the attention of her hunky co-star, who was also showing off his toned figure.

The mother-of-one was frolicking poolside with her Cougar pal Josh Hopkins, who had also stripped off down to his swimming trunks.

Her on-set love interest gave Courtney a kiss as she lounged in the sun while her other co-star Brain Van Holt kept closeby too.

Courtney's rumoured love interest Van Holt, who plays her on-screen ex-husband Bobby Cobb, was spotted on the beach in Oahu in his underwear.

Yup, natural is the way to go!

Holly Madison recently flaunted her 'curves' and 'cellulite' in a bikini photo shoot.

The model, who has appeared in several spreads forPlayboy is featured on the cover of the new Life&Style in an unretouched photo that reveals some of her 'flaws'.

"I have cellulite -- and had it even when I was at my absolute thinnest. I'm never not going to have cellulite. People need to just accept that it's there and maybe dress accordingly or use body makeup to cope with it," the New York Daily News quoted her as saying.

Indeed, what some would deem "cellulite" is clearly visible on the 32-year-old in one of the unretouched pictures featured inside the magazine.

Madison was inspired to speak out and showcase her body after being criticized for gaining 15 pounds.

A choreographer had told her she needed to lose weight, and fellow model Jayde Nicole, who is featured on Madison's reality show Holly's World, told Life&Style that "Holly needs to lose 10 pounds of fat."

But now the blond bombshell is firing back.

"I'd rather be overweight and curvy than superthin with no curves," she said.

"I've always had a butt, and I want to keep it -- cellulite and all. I'm not perfect, but I love my curves," she added.

The new magazine shots show the Keeping Up With The Kardashians star in a string of sexy poses, reports the Sun.

In one saucy pic, the curvaceous reality TV babe, 30, poses in unzipped denim with just her arms covering her chest from exposure.

In another shot, Kardashian flaunts her natural assets in a frilly red bra and denim waistcoat.

The hotel heiress had on an extremely low cut top, a waterfall cardigan, a black biker jacket and strangely, finished the look off with a beanie hat, reports the Daily Mail.

Hilton, who turned 30 earlier this month, was heading to the Porofino Sun salon in Beverley Hills hiding her eyes in a pair of 1980s-style retro sunglasses.

The socialite finished off her sombre and strange outfit with a black handbag, wide-legged trousers and black nails for an all-over gothic look.

But she was quick to put some colour back into her life and nipped into the salon for a spray tan in her all-front outfit.

After a quick session, Hilton emerged with an orange glow to her skin, making her style choice even less fashion forward.

The 44 year-old Mexican born beauty has confirmed that her line of glamorous goods with Mexico-based ingredients will be hitting the chain drugstore CVS shelves next year, reports the New York Daily News.

"I always wanted to do this," Hayek told T Magazine, "because my grandmother, who was a beauty, she died at 96 with no wrinkles. And you should see my mother! We have some family secrets..."

These "secrets" to the line, which she said she's been planning for years, include tepezcohuite, a shrub native to Mexico and Brazil, touted for its healing properties.

Ever since she dropped her excess weight, Jennifer Hudson's figure has been under intense scrutiny.

While the 29-year-old looked stunning at the Oscars in her orange Atelier Versace gown, she has sparked a furious debate since stepping out looking slimmer than ever on Sunday night.

Nutritionists said that Jennifer, who has lost 80 lbs, had gone too far with her weight-loss regime, while a consensus among an Allure magazine writer's friends found her to be "too thin".

"Jennifer Hudson's appearance left me wondering how far she has pushed the Weight Watchers diet," the Daily Mail quoted dietitian Marisa Sherry as telling CBS News.

"She looks good, but each time I see her she seems to be getting skinnier and skinnier and she's now at the point where I would start to question how far she will go," Sherry said.

Allure editorial assistant Alison Caporimo recalled comments made about the actress and singer at an Oscar's party.

She told how one friend mused: "I think she might be too thin, you know? I liked her better when she was in the middle: not overweight, but not too skinny."

And Hollyscoop called her weight-loss "a disappearing act". In an article, they wrote: "Jennifer Hudson has pulled a disappearing act on us. She was so svelte in her tangerine orange Versace dress at the Oscars, she nearly vanished when she turned to the side."

Speaking of her awards appearance, Hudson had to engage a man to help her with her dress to make her way into the Oscars. She had her manager, Damien Smith, behind her all night carrying the long train of her knockout dress at the Kodak Theatre.

"I do need a bit of help with this dress, so he's kindly helping me out," the New York Post quoted Hudson as saying.

She paraded through the crowd at the packed Vanity Fair party at the Sunset Tower Hotel, with Smith dutifully following behind, dress in hand.

"I don't mind holding her dress. It is a big night for her," Smith said.

This is one makeover that's really come dear! Teen heartthrob Justin Bieber, who criticised Lady Gaga's fashion sense last week, got a taste of style-related criticism himself when he lost 80,000 fans for chopping off his famous locks.

The 16-year-old star had the crop so he could sell off the hair for charity, reports the Daily Star.

But his 7.5million Twitter followers deserted him in their droves after he unveiled the style on the site.

However, the Baby singer did not seem too worried.

"I got a li'l haircut. I like it," the singer tweeted.

Any comments, Gaga?

Black Swan star Natalie Portman has shown her sexy side in a French fragrance commercial.

The ad for Miss Dior Cherie perfume shows the actress standing with her bare back in a half zipped little black Dior dress while her on-screen lover awaits her in her bed, reports the New York Daily News.

Portman is also seen blindfolding her on-screen beau with his bow tie, kissing him passionately on a bed and soaking in a tub wearing nothing but her Dior sunglasses.

Director Sofia Coppola drenches the ad with Parisian glamour from the Serge Gainsbourg soundtrack to the clear homage to Jean Luc Godard's 1960s films.

Another image that Coppola added is a white swan gliding through the water -- an obvious nod to Portman's Oscar-winning role as a ballerina in the Darren Aranofsky film Black Swan.

The star poses sexily by a swimming pool in the new promotional shots for the toning trainers.

Wearing a tight red top, black capri pants from the apparel range and a pair of the fitness shoes, Eva is the epitome of fitness and wellbeing in the summery shots, reports the Daily Mail.

Talking about EasyTones, which tone muscles in the legs and bottom as you walk, Eva said: "I feel better when I'm in good shape, and that's what I like about Reebok EasyTone -- it gives me a little extra as I go about my daily activities."

"Between long days on the set and travel, it's not always possible to get a full workout in, so I have to make the time I have count. As an actress, being fit is important, and EasyTone is my great secret!"

Uli Becker, President of Reebok International, added: "Eva Mendes fits perfectly with Reebok and EasyTone -- she's fun, inspirational, committed to fitness and a style icon to women around the world."

Blake Lively says it was her mother who helped to shape her own fashion sensibilities.

The actress, who is the new face of Chanel's ad campaign for its "Mademoiselle" handbag, gave credit to her mom for educating her about fashion, reports the Sydney Morning Herald.

Lively said her fashion model mother gave her an appreciation of beautiful clothes.

Her mother is also an accomplished seamstress who used to make her own clothes, and would bring her daughters along on shopping expeditions to buy fabrics.

Lively said while having the right look is important, confidence is key in making an outfit work.

Despite the occasional criticism of her red-carpet style, Lively says as long as she's "being herself" and feels comfortable in what she's wearing, she loves it.