World's sexiest swimsuit model and more fashion news!

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

Which supermodel's legs are desired by 39 per cent of women? Which superstar has spent a whopping 54,000 pounds on special facials?

Here's the lowdown on the latest fashion news!

Joanna Krupa is world's sexiest swimsuit model -- and flaunts it on the beach!

Joanna Krupa has been voted the world's sexiest swimsuit model by Playboy Magazine -- and seemed to be eager to show off her taut body at Miami Beach on Sunday.

The 32-year-old model drew plenty of stares because of her enviable figure as she played a game of volleyball, the Daily Mail reported.

The blonde beauty was taking part in the 2012 Model Beach Volleyball tournament in the Florida holiday hotspot and made sure she challenged other gorgeous ladies, not just in the sporting stakes.

Krupa's physique looked mind-blowing as she stood next to her competitors and although she may not have won the game, when it comes to most impressive body she wins hands down.

She stood confidently in the golden sands, displaying her ample assets in a patterned string bikini and salmon-pink shorts.

The star stood out from the crowds as she enjoyed herself in the sunshine with her hair slicked back into a neat ponytail and her talons perfectly manicured.

Despite the vacation area being a hotspot for attractive ladies, Krupa stood out as she bared her taut midriff alongside fellow females.

Before she donned the skimpy outfit, Krupa walked around in a long multi-coloured dress, which left a little more to the imagination.

Displaying a blue band around her ankle for her entry into the contest she was happy to meet and greet her fans, one of them being an adorable dog.

The PETA activist was seen playing with a boxer prior to her sports match and couldn't stop stroking the pooch as its owner looked on.

Bar Refaeli takes to the tennis court in a new ad showcasing just how fuss-free her new underwear line is.

The former Sports Illustrated swimsuit model is seen in the promotional video prancing around with a racquet hitting a few balls in just her Under.me smalls, the Telegraph reported.

Showing how she can bounce around, serve an ace and jump on the spot without so much as a wobbling midriff or blob of cellulite, Refaeli -- who dated Leonardo DiCaprio for six years -- asserts herself as a sporty, almost tomboy-ish kind of girl.

Describing Under.me as "a focused collection of beautifully-made basics that look good and feel amazing", she explains that she believes underwear should complement the body and not "steal the show."

Jennifer Lawrence has laughed off suggestions that she looks "chubby" in the movie The Hunger Games.

The 21-year-old actress -- who portrays heroine Katniss Everdeen in the movie -- thinks it's 'hilarious' that people are suggesting she is too plump to play the character, as she thinks it promotes an unhealthy lifestyle to young girls.

"Jennifer told me, 'This is hilarious. First, people say how so many actresses in Hollywood look anorexic, and now they are criticising me for looking normal,'" Contactmusic quoted a source close to the star as telling the Chicago Sun Times.

"Thin body images are too often adopted by young girls and women thanks to what they are constantly being shown as being attractive," the source said.

Comments from film critic Todd McCarthy in which he referred to the Winter's Bone star as possessing "lingering baby fat" and Jeffrey Wells calling her a "big-boned lady" unleashed a torrent of furious responses from Hunger Games fans.

Salma Hayek, who looks glamorous despite being in her mid-40s, has revealed that she had bad acne and low self-esteem when she was 25.

The gorgeous 45-year-old Mexican actress opened up in the May issue of Lucky Magazine about the self-image issues she suffered from prior to her very successful brush with fame.

"You want to talk about bad skin? I had acne," the New York Daily News quoted her as saying.

"And this acne was so bad, it sent me into a severe, severe depression. Like I couldn't leave the house," she said.

The Grown Ups star also said that having low self-esteem about her skin then led her to eat.

"The next stage with that sort of depression is food: too little, or too much."

"Guess what I did? I mean, I was fat and broken out, I couldn't leave the house and I couldn't pay the rent!" she said.

Hayek, who currently owns her own beauty line Nuance, added that it didn't help that she had an immense sweet tooth as well.

"I like to eat. I'm always on the edge of how much can I eat without looking too -- you know. If I eat something salty, it makes me want something sweet. I eat something sweet, then I want salty. And exercise is not my thing, though I do it," she added.

Kim Kardashian has revealed that her newly single status prompted her to lose weight.

The reality TV star claims to have lost six pounds in just seven days.

"I figure I'm single. Now is the best time to get in shape," Contactmusic quoted her as telling Us Weekly.

The 31-year-old said that she managed to shed the pounds by working out two times daily, which included early morning treadmill runs and strength training, coupled with Pilates at night.

She also changed her diet, and cut out gluten, sugar and dairy.

"No more sitting at home, eating too much!" she added.

Elle Macpherson received 39 per cent of the votes in a poll as the model with the legs most females want to have.

Gisele Bundchen and Tyra Banks came joint second with 11 per cent and Britain's Lisa Snowdon third with nine per cent, the Daily Express reported.

The study, by Nair Brazilian Spa Clay, revealed that women would give up other guilty pleasures to get a pair of catwalk pins.

Apart from takeaways (59 per cent) and chocolate (53 per cent), they are prepared to go without alcohol (49 per cent), cigarettes (42 per cent) and even sex (37 per cent).

But only 27 per cent would give up their mobiles and just 16 per cent the Internet.

Macpherson's legs were also the most desired by men, scoring 30 per cent.

Madonna has reportedly bought six Intraceuticals facials -- which need to be administered by a special machine -- costing 9,000 pounds each.

The pop star is reportedly not in favour of cosmetic surgery, once saying that she doesn't "like the idea of someone putting you to sleep then taking knives to you", the Telegraph reported.

The remarkably unlined star, 53, is a fan of Intraceuticals Rejuvenate Daily Serum and its facials, which apparently give the Botox effect without Botox.

The facials need to be administered by a special machine -- in her case machines. Madonna bought six of them at around 9,000 each, which takes her total beauty cost up to 54,000 pounds.

Tara Reid has admitted to being happier than ever and insists that she is enjoying ageing as it has made her much more relaxed.

The 36-year-old actress, who was earlier known for her partying ways, enjoys her slower-paced life and loves nothing more than a quiet night in.

On being asked if she hates getting older, she replied by saying that she is a lot more at peace and relaxed.

"Actually, I like it. I've been through a lot and I feel good with my life right now. I'm a lot more at peace and relaxed. And that has a lot to do with maturing; you calm down a lot and life isn't so fast-paced. I like nothing more than chilling with my dog by the fireplace," Contactmusic quoted her as telling Australia's Daily Telegraph newspaper.

Last August, Reid had announced that she had married Bulgarian financier Zack Kehayo in Greece after three months of dating, but she later admitted the union was not legal.

Now, the American Reunion actress has confirmed she is currently single.

"I'm not married. I'm very single and very happy right now."

The blonde actress insists she isn't worried about the future and whether or not she will marry eventually because she feels happy with herself.

"If it's meant to be that I get married, then great. But if not, then that's great, too. You have to be happy with yourself, I feel good about where my life is going," she added.

Demi Lovato has hit out at the TV and movie industry for "glorifying an unhealthy body image" and putting "a lot of pressure" on young female viewers to be thin.

The 19-year-old -- who checked into rehab in October 2010 to receive treatment for self-harm and bulimia -- thinks film and TV companies should 'take more responsibility' about the kind of messages their shows and motion pictures send across.

"I feel as if television and movies are now glorifying an unhealthy body image which puts a lot of pressure on young girls -- and especially girls that are growing up and trying to find themselves," Contactmusic quoted her as saying on ITV1's Daybreak show.

"A lot of girls who are young are insecure, and they look to the media and what they see in magazines and everything else to see what they should look like. And I think that the film industry and the television industry should take more responsibility," she said.

The singer, who has previously told how she started self-harming when she was 12 years old, has urged young girls who are the subject of bullying to seek help because it's 'really dangerous' to keep thoughts bottled up.

"A lot of people ask me, 'Do you think it's because you started in the industry so young, or is it the pressures of being in this industry?' And I say 'no' because my problems were starting when I was 12 years old, 11 years old," she said.

"I was bullied when I was 12, and that's when I got really sick and so it's been going on for a quite a while now, but finally I've gotten help."

"As much as it hurts when you're being bullied -- always rise above it and also vocalise what's going on. You can't keep it inside. It's really dangerous to let your emotions bottle up or to let nobody know what's going on -- you should really tell someone," she added.

Emma Watson has put her dreams of building a career as a fashion designer on hold after her clothing line for the ethical label People Tree failed to sell.

The 21-year-old Harry Potter star, who has also collaborated with Italian designer Alberta Ferretti in the past, is now concentrating on her studies at Oxford University instead.

"Emma was so disappointed," the Daily Mail quoted a source as saying. "But even at knockdown prices, the clothes were still sitting on the shelves."

"She's also stalled on plans to do more with Ferretti because she doesn't have time," the source added.

A recent study has found that more than 80 per cent of Australian women wear bras that don't fit them.

The weight of 16DD breasts are approximately 600 grams each, which is equivalent to carrying around over a litre of milk on your chest. Without support this sort of weight can lead to back, neck and arm pain, as well as poor posture. It can also prevent women from exercising due to discomfort or self-consciousness.

Yet, the vast majority of women, 16DD or otherwise, don't wear bras that fit.

The study by Sports Medicine Australia and the Breast Research Australia (BRA) team found that 88 per cent of teenage girls wear a bra that doesn't fit properly and that 85 per cent failed a simple knowledge test on bras and bra fit.

As a result, women continue to wear ill-fitting bras into their adulthood. A separate study found that 85 per cent of women wear a bra that doesn't fit properly.

Despite this, 75 per cent of the younger study participants and 67 per cent of the older women surveyed do not use the bra-fitting services that some bra retailers provide.

Lead researcher and co-author on the study, Dr Deirdre McGhee believes there are numerous reasons for this and embarrassment about baring their breasts and bodies to a stranger is one of them.

"Change rooms are not a pleasant experience for most women," the Sydney Morning Herald quoted her as saying.

McGhee also believes the subject of breasts and bras is largely taboo.

"I think...women haven't been educated by their mothers, (who) didn't know basic information and so (haven't) passed it down. It's a secretive and awkward (topic). But, when you talk about it, you open a can of worms and women pour out complaints," she stated.

One of the most common is that bras are uncomfortable and that women can't wait to get home so they can take them off.

"Women don't have expectations that bras should be comfortable. (In the study) they weren't aware or didn't perceive discomfort as a problem," she stated.

But bras should be comfortable, she insisted.

"It has to fit like a glove. The best bra in the world is no good if it doesn't fit," she claimed.

To help women find a bra that fits properly, BRA and Sports Medicine Australia have collaborated to develop a free bra-fitting guide.

McGhee stresses it's important to remember that sizes are not standardised in Australia, so women are unlikely to be the same size in every brand. Even in the same brand, a woman's bra size can vary along with style and colour of the bra.

"Dyes can affect the size," she said.

The guide offers tips such as the best level of support depending on exercise, age and bra size.

Through the guide, McGhee hopes to help women better support themselves, and to shed a little light on the secret world of bras and breasts.