IMAGES: Irina goes nude 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 lingerie supermodel is all set to take her heavenly body into outer space? Which femme fatale's gorgeous mane has been secretly greying since she was 23?

Here's the lowdown on the latest fashion news!

Irina strips off for Marc Jacobs!

It's been a busy week for Sport's Illustrated beauty and girlfriend of footballer Cristiano Ronaldo Irina Shayk.

Aside from the launch of her sizzling new swimsuit campaign, the Daily Mail has reported that fashion's golden girl is the latest model to strip off for Marc Jacobs' 'Protect the skin you're in' campaign.

The 25-year-old Russian looker shows off her assets on Jacobs' latest line of tees, which have seen a host of celebs shed their clothes in recent years. The money generated from the sale of these shirts goes to the NYU Cancer Institute at NYU Langone Medical Centre.

Other notable faces who have fronted the campaign include Marisa Miller, Heidi Klum, Victoria Beckham and Eva Mendes.

In more bikini body news, actress Gwyneth Paltrow has revealed it isn't easy maintaining a fabulous figure.

The Daily Mail reports that the 38-year-old actress' slimming 'snacks' are mostly in liquid form -- she opts for coconut water and kale juice when she gets hungry between meals. "Raw almonds with raisins, or coconut water, or I'll make a juice with kale, lemon juice, water, Vitamix and a little agave," she said.

Gwyneth's revelations come in the latest issue of Self magazine, where she shows off her bikini body on the front cover and in an accompanying inside shoot.

"When I want to lose, I eat less pasta, bread and potatoes. Before last year's Iron Man 2 premiere, I did green juices and salads for three days," the mother-of-two shared.

Gwyneth also discusses her gruelling workouts in the magazine's cover story: "I do 45 minutes of cardio five days a week, because I like to eat. I also try for 45 minutes of muscular structure work, which is toning, realigning and lengthening," she said.

It's true -- we don't always know what's going on behind the scenes. Jennifer Lopez, who recently earned the title of 'World's Most Beautiful Woman' from People Magazine, has confessed that she started going grey at 23.

"My mom and my dad both went grey at a young age and I did too. At 23," the Daily Mail quoted the Latino singer, who is also a judge on American Idol, as saying on a US radio show.

"Once I got started doing movies, I started to grey. It was the stress, the pressure," she joked.

She then quipped that since she married Mark Anthony she had to get her hair done "every two weeks".

Another celeb who's been dishing about her hair recently is Cheryl Cole -- she's admitted that she would love to cut her trademark long locks, but thinks she is not beautiful and confident enough to carry off a short boyish crop.

"I want to (go short) and I think that it must be amazing to just wash, spray and go," the Daily Express quoted Cheryl, 27, as saying.

"But I wouldn't suit it. You have to have an unbelievable face to carry it off and confidence in abundance."

But she says that there's an advantage to lengthy tresses when it comes to being a much-photographed star.

"I just love long hair. It's a comfort blanket. With short hair you can't hide behind anything."

Mad Men star Christina Hendricks has revealed that she is addicted to buying luxury handbags.

The actress, who has sent male pulses racing as curvy secretary Joan in the hit US drama, admitted that she has become a fashion victim.

"I'm always shopping on eBay. I love handbags. At the moment I'm trying to find a vintage crocodile clutch. I have a 'watching list' on eBay," the Daily Express quoted her as saying.

The 35-year-old has other addictions too.

"I've got hundreds of lipsticks. Every colour of the rainbow!" she said.

Looks like Irina isn't the only hotbod to pose in the buff this week!

Ukrainian/American professional ballroom dancer Karina Smirnoff has said that she is thrilled to have been given the chance to show off her toned physique in Playboy Magazine.

Smirnoff, 33, who performed in Dancing With The Stars, bares all in 10 images inside the May issue, and in one she is seen wearing nothing more than ballet shoes and red ribbon wrapped around her arms.

"As a dancer I've always embraced my body. I'm thrilled to show off my strong, toned physique in the pages of Playboy and celebrate my sexiness," the Daily Mail quoted her as telling the magazine.

"To me, sexy is the confident energy a person produces. Sexy is the comfortable feeling of being who you are. Sexy is not just having beautiful lips, legs and arms; it's beyond that. Sexy is soul," she stated.

It was claimed that producers were furious about her decision to be the first professional to pose nude for Playboy; however, sources close to the star insist otherwise.

"They did know ahead of time and they still gave her one of the best pairings," an insider told People Magazine.

Not all beautiful women are comfortable with revealing too much, however. Unlike a lot of her contemporaries, Taylor Swift has said that she will not be dressed skimpily for photo shoots because that isn't how she dresses in her everyday life.

"It's just a life decision. I like wearing pretty dresses and I like trying out new styles, but I don't feel comfortable taking my clothes off," Fox News quoted Swift as telling the Telegraph.

"I wouldn't wear tiny amounts of clothing in my real life, so I don't think it's necessary to wear that stuff in photo shoots."

Naturally, Swift's handlers -- having a gorgeous, 5'11", 21-year old blonde on their hands -- have tried to convince her otherwise. But when asked if they still try to get her to disrobe for the cameras, Swift responds, "Not anymore, no."

Another day, another lucrative endorsement deal! Fergie, whose debut fragrance broke sales records for Avon last year, is set to launch her second perfume, 'Outspoken Intense'.

The Black Eyed Peas singer announced plans to launch her second fragrance at an event to celebrate Avon's 125th anniversary.

The 36-year-old said that Outspoken Intense was inspired by "that moment of adrenaline and being fearless" before she goes on stage.

The six-time Grammy winner also stars in a television commercial to promote the fragrance. It shows her spritzing herself with the fragrance ahead of a performance.

She took to the stage at New York's Madison Square Garden in an orange Diane von Furstenberg dress ahead of the debut screening.

"It's about that intense feeling I get before going on stage. That moment of adrenaline and being fearless," the Daily Mail quoted her as saying.

She added that she played a large role in developing the scent.

"I had so much fun developing and launching my first fragrance with Avon, so for my second fragrance, I really wanted to add a little more edge."

"Outspoken Intense is a provocative blend of sexy confidence and daring femininity that captures the thrill and excitement of being centrestage."

"You feel an instant, electrifying rush -- a feeling like no other," she added.

Avon's Jason King added: "We are thrilled to be working with Fergie again, as she is a true representation of female empowerment."

With Earth Day a week away, a leading retailer in the UK has already given shoppers an eco-makeover.

Marks and Spencer has made 'going green' even easier as it launched the world's first ever carbon neutral bra in the UK market, reports the Daily Mail.

The new Autograph Leaves lingerie collection that includes four styles of bra, three knickers and a set of suspenders is certified by the Carbon Trust Footprinting Certification Company, which calculated the range independently.

The collection was manufactured at the M and S eco-model factory in Thurulie, Sri Lanka.

The innovative renewable energy features and reduced waste initiatives implemented at this site have helped reduce the carbon intensity of the energy used by an estimated 33 percent, compared to typical factory production.

"Nature is the inspiration behind Autograph Leaves, so it's fitting that this range benefits the environment too," said Paschal Little, Head of Lingerie Technology at M and S.

"As the UK's lingerie market leader, we think it's right that we should lead the way in exploring new, more sustainable manufacturing options," he added.

The factory's local community is also benefiting from this initiative.

Working in partnership with nine local farmers, M and S is planting over 6,000 trees in the desolate land between the Kanneliya and Polgahakanda forest reserves.

The Autograph Leaves collection is available online and will be in stores from this weekend.

Blonde bombshell Doutzen Kroes is set to board a spaceship.

The Victoria's Secret Angel will take a Dutch commercial flight into space to bring awareness to the HIV/AIDS philanthropy Dance4Life, reported Vogue.

Space Expedition Curacao offered the model a ticket on the 2014 space mission.

"My work has literally brought me to the most beautiful places on earth," the New York Daily News quoted her as saying.

"But apparently, nothing is as beautiful as a view of the earth from space. Astronauts who have been lucky enough to have had that experience say it is life changing. I cannot wait to go," she added.

Actress Amanda Holden has posed as a naked Marilyn Monroe for a new footwear campaign.

Holden, 40, who is the lone female judge on Britain's Got Talent, was photographed stretched across a bed naked, with just a pair of black TrimSole flip-flops, and a sheet to hide her modesty.

With her short hair curled and lashings of red lipstick, the former Cutting It star channels the spirit of the late Hollywood icon Monroe.

Holden officially launched the new campaign for the Spring/Summer 2011 collection at London's historic Criterion restaurant in Piccadilly.

Footwear from the TrimSole brand comes with a unique Trim-Tech sole to subtly shift your centre of balance to make your legs work harder when you walk.

"I'm convinced my bum is already more pert after wearing the shoes all day," the Daily Mail quoted Holden as saying about the range.

The new collection features not only traditional colours like black and silver, but also animal-prints for the more flamboyant fashionista.

TrimSole footwear starts from 24.95 pounds and is available online.

Star of 30 Rock Katrina Bowden has been named the winner of Esquire's 'Sexiest Women Alive Madness Tournament'.

Bowden, 22, beat out 63 other competitors, including second-place finisher (and reigning champ) Brooklyn Decker, Megan Fox, Kim Kardashian, Emmy Rossum and others.

"If you say my name and then say Megan Fox's name, most people know who she is but, well, a small percent will know who I am," the New York Daily News quoted Bowden as saying, as she reflected on her win.

"I think a lot of the fans of 30 Rock kind of went crazy with it," she said.

The actress, who also admitted she voted for herself, celebrated with an intimate photo shoot in her own home, trying out a new wardrobe, lacy underwear included, in front of the camera.

"I've never done more skimpy, racy photos -- ever. Well, these aren't "racy", but they're not exactly full outfits either," she told Esquire.

The TV star also celebrated her win on Twitter earlier this week, thanking "the amazing fans who voted" for her.

If you've got the money and fancy purchasing a piece of jewellery that played a part in Hollywood history, late actress Elizabeth Taylor's prized collection, which includes some of the world's most expensive stones, is set to go under the hammer.

Christie's has said that the collection will be sold along with pieces from the star's art collection, some of her clothing and other memorabilia, reports the BBC.

The auction house said it was planning a series of auctions dedicated to Taylor after reaching an agreement with the late actress's family.

Details of the auction will be announced this spring.

From Liz Taylor, we come to Liz Hurley -- the first name that comes to mind when thinking of a woman who looks fabulous at every age.

And so it was only appropriate that the stunning 45-year-old model-actress helped host the event feting the winners of its 'Fabulous at Every Age' party in New York recently.

The annual contest, held in association with Harper's Bazaar magazine and cosmetics firm Estee Lauder, honours five women in their 20s through to their 60s for being chic and fabulous, and who are nominated by friends and family.

The grand finale winner, who walked away with 10,000 dollars, was Brandyn Barbara Artis, a woman in her 60s from California, described as being "effortlessly chic and fabulous," reports the Daily Mail.

And a special mention went to Margaret Bonner, who recently celebrated her 102nd birthday and according to her daughter, "exemplifies charm, grace and elegance".

Pleased with how the night shaped up, Hurley took to her Twitter page and wrote: "Just presented prizes at the Harpers Bazaar/Estee Lauder party 'Fabulous at Every Age'."

"All gorgeous women. Grand finale winner in her 60's!" she added.

Italian designers Domenico Dolce and Stefano Gabbana were gushing over Justin Bieber's sense of style at a party they threw for him last week.

Upon hearing that the Canadian star was playing at Milan's Mediolanum Forum as part of his world tour, the design duo organised an ultimate after-party for the 17-year-old singing sensation at their own restaurant Gold.

A VIP area, complete with Bieber's name installed in huge gold lettering, ensured there was no confusion as to who the party, which was held on April 9, was for.

"We like him a lot, although he's very young, he's very attentive towards style and he takes care of his look," the Telegraph quoted Gabbana as saying.

"It might be slightly premature to talk about a style icon, but it's impossible to deny that he's a model for his peers. Every age and every generation has its icons, after all," added Dolce.