Kim tweets steamy pics 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 celeb was named te world's best-dressed woman? Which beautiful young actress nearly suffered wardrobe malfunction?

Here's the lowdown on the latest fashion news!

Kim Kardashian tweets steamy pics wearing lingerie

Kim Kardashian has posted a raunchy photograph on Twitter, which shows her lying on a table wearing nothing more than stockings, lingerie and a fur coat.

In the image, the 31-year-old reality star has worn several long pearl necklaces and is seen holding her hand to her head while looking up to the ceiling, the Daily Mail reported.

The caption accompanying the photograph read: "Goodnight."

Posting the image again, she wrote: "Sweet dreams."

Finally giving up on sleep, the socialite tweeted: "Can't sleep...setting up my new black and gold blackberry! #2phones4life."

Lana Del Rey has stripped naked for a spread in GQ to celebrate being named the publication's Woman of the Year.

The cover of the October edition of the magazine features a bold image of the American singer preserving her modesty by crossing her legs, while another naked photograph of the star is published alongside an interview.

In other photos, Del Rey is shown covering her private parts with a net curtain, posing seductively in a figure-hugging white basque, spreadeagled on rocks wearing an elegant black gown and towering heels, and sitting in a chair while a man gropes her breasts.

"Just to have someone acknowledge the material I write is incredibly touching. It's an affirmation of sorts," the Daily Express quoted Del Rey as telling the magazine.

Blake Lively, who is often envied for her tall and slim figure, has admitted that she has no interest in exercising to stay in shape and doesn't follow a specific diet or health routine.

The newlywed actress also disclosed that she never indulged in drugs and avoids alcohol.

"I wish I could lie and say that I do something, but...I obviously have plenty of imperfections on my body, but I'd rather have a little bit of cellulite and go do a food trip and try every ice-cream place in the South," Contactmusic quoted Blake as telling Allure.

The blonde beauty -- who wed Ryan Reynolds in a secret ceremony on Sunday -- is also not fond of partying and nightclubs.

"The music is so loud, you can't have a conversation with somebody. If I were an amazing dancer, yeah, I'd go, but I'm definitely not. My friend calls me a speed walker because my elbows are everywhere," the actress said.

"It's not like I decided on these strict lifestyle choices and I'm enforcing them. It's just something that I genuinely don't have a desire for," she added.

Gwyneth Paltrow beat the Duchess of Cambridge to become the world's best-dressed woman.

According to Contactmusic, the 39-year-old actress, known for her classic and sophisticated style, was given the prestigious honour by People Magazine.

The publication said that it was impressed with her simple fashion choices, the Daily Star reported.

Others featured in the list were Emma Stone, Jessica Alba, pop star Rihanna and Australian supermodel Miranda Kerr.

The Duchess of Cambridge was feted for the best classic style.

Brad Pitt, Robert Pattinson and Jay-Z were ranked at the top in the men's list.

Jessica Simpson has revealed that she was motivated to kickstart her post-pregnancy weightloss programme after she looked at her naked, heavy frame in the mirror.

The singer and actress recently admitted to piling on the pounds while pregnant with her baby daughter Maxwell because she wanted to enjoy her first pregnancy.

Simpson subsequently signed up as the new spokesmodel for diet plan WeightWatchers and has since lost 40 pounds (18 kilograms).

The 32-year-old revealed her slimmer figure on US TV on Monday.

"The easiest way to get motivated is to strip naked and look in the mirror. It's not fun to be talked about. It's not fun to be judged," Contactmusic quoted Simpson as telling the US news show Access Hollywood.

Emma Watson recently revealed too much, as her dress slipped out of place at the Hollywood premiere of The Perks of Being a Wallflower on Monday.

The British beauty accidentally exposed too much of her breast in a low-cut Giorgio Armani gown, but it was a flesh-coloured pastie she was wearing that saved her from further embarrassment, reported Us Magazine.

The 22-year-old, despite her momentary wardrobe malfunction, walked down the red carpet looking beautiful in bright red lipstick with her hair pulled back.

The actress seemed to be very happy, as she had been praised for her role in The Perks of Being a Wallflower as Sam.

"Did I tell you we got a standing ovation in Toronto Film Festival?" the magazine quoted her as tweeting.

Rihanna has chopped off her long locks and opted for a schoolboy-style crop, which is said to be one of her most extreme looks till date.

The popstar, who is known for experimenting with her looks, stunned her fans by lopping off her long tresses ahead of her performance at the MTV Video Music Awards.

The 24-year-old donned a white tee-shirt, ripped jeans and a pair of trainers as she arrived at the Staples Center in Los Angeles.

"Never felt more me in my whole life. LOVE my hair, feel so happy, pretty, and free," the Sun quoted her as tweeting.

Kate Middleton has been voted as having the hairstyle British women covet most.

The British royal polled over a quarter of the vote, while Holly Willoughby took in just under a fifth of the votes, in a survey conducted by salon products retailer Fabriah.com, the Daily Mail reported.

Experts at the company compiled a shortlist of the top ten celebrity hairstyles before opening it up to a public vote.

The poll of 500 women showed that big hair with volume and curls is definitely on trend, with singer Lana Del Rey, who has long, wavy hair, coming in third place.

Meanwhile, Jennifer Aniston -- who once had the most sought-after hair with her 'Rachel' style from Friends -- showed that she is still popular, with her current sleek look coming in at number four.

Francesca Davies from Fabriah.com said the results reflected the times, as Kate is currently the fashion icon of the moment, with women clamouring to copy her style.

"Truly great hair comes about rarely and when it does it is a real trend setter," she said.

"If we had taken this poll ten years ago Jennifer Aniston would have probably been number one."

The bottom three places in the poll went to reality star Kim Kardashian and Nicky Minaj, who both polled four per cent, and X Factor judge Tulisa Contostavlos who scored three.

Top 10 hairstyles:

1. Duchess Cambridge
2. Holly Willoughby
3. Lana Del Rey
4. Kelly Brook
5. Jennifer Aniston
6. Rochelle Hume
7. Victoria Beckham
8. Kim Kardashian
9. Nicky Minaj
10. Tulisa Contosavlos