Nicole Kidman bares her sexy back 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 racy new ad campaign has been banned? Which preternaturally preserved star is sharing her workout secrets?

Nicole Kidman gets cheeky in new photoshoot

Nicole Kidman has dared to bare her back for a racy photoshoot with famed fashion photographer Mario Testino.

The 45-year-old Australian star appears in a short black skirt, embellished with a gold belt and nothing else on the cover of V Magazine.

In the photo, Kidman turns her back to the camera and keeps her arms folded over her bare chest to protect her modesty.

"Beautiful, beautiful," an enthusiastic Testino raved to his new muse as he snapped the images at his Manhattan studio.

"You are so hot it is beyond! Look at your body! It is incredible!" News.com.au quoted him as saying.

Other photos show Kidman sprawled out on the ground in lingerie, draped in a red fur coat, with bedhead blonde hair.

The actress revealed more than just her fit figure, admitting that she finds it hard to balance work and family, and doesn't plan her career too carefully.

"I don't really make decisions. I go with the flow," she told the magazine.

"If I were a strategically minded person, I think I would have a far different career. But I would be more outlandish if I could. A lot of times you just don't get the chance," she said.

Kidman, who has two young children with country singer husband Keith Urban, admitted it's hard to tear herself away from her family for work.

"I just don't want to miss anything, and I don't want them to go 'Where's my mom?' So I'm working through that," she added.

Kim Kardashian treated her fans to another hot holiday snap, showing off her famous figure in a demure swimsuit with a sexy open-mouthed pout while frolicking on the sand beside a huge rock.

She posted the photograph on her Twitter account with the message: "Rock climbing lol."

The 31-year-old reality star has been holidaying with boyfriend Kanye West and various family members, including stepdad Bruce Jenner in Hawaii, the Sun reported.

An ad for shoe designer Brian Atwood, has been banned from display, as it was considered too racy by the building housing his soon-to-open New York store.

The campaign poster, which features Victoria's Secret model Candice Swanepoel, shows the South African stunner dressed in a black basque, hold-up stockings and leopard-print heels, while sitting astride two bare-chested men.

According to the New York Post, the billboard ad was to be displayed outside the new boutique at 655 Madison Avenue in Manhattan's Midtown, the Daily Mail reported.

A film version of the ad, which was to be aired on screens in New York taxis, has also been banned by the companies that provide TV content for the Taxi and Limousine Commission.

And a toned-down trailer for the film has been rejected for the in-taxi TVs too, so a behind-the-scenes teaser will be aired instead. The film itself will be played only on the Atwood's website.

As for the store exterior, the label has had a less racy image from the campaign approved for display.

The large-scale ad campaign is a first for Atwood, whose shoes are popular with several celebrities including Victoria Beckham, Jessica Biel, Kate Hudson and Rachel Weisz.

Shot by top fashion photography duo Mert Alas and Marcus Piggott, it will be making its debut this month in the September issues of Vogue, W, V Magazine and CR Fashion Book.

The film, which is based on the theme, "the sex is in the heel," has been described by the designer on WWD.com as "sexually charged."

Natalie Portman has revealed quite a bit in the Nude Lipcolor ad campaign for Dior.

The collection includes eight new shades, including a special hue, Grege #169, proceeds from which will be going to the Oscar winner's charity of choice, the 'Free the Children Association.'

"I chose the colour Grege because it's the one I'd pick to wear myself," People Magazine quoted her as saying in a statement.

"The number (169) contains different dates that are important to me and my family," she said.

Grege was also the colour that had been used to represent Christian Dior's 'New Look' back in 1947.

She's 39 and a mother of four, but Heidi Klum is still in amazing shape.

The German supermodel has been giving fans an insight into her life with photographs regularly updated to her Twitter account, the Daily Mail reported.

In one of her more recent pics, she is seen reclining in a two-piece and soaking in the sun at an exotic seaside locale. She captioned it 'Finally... relaxation!'

Despite the glamorous life and career she has, Heidi has said that though modelling pays her bills, it is her newly launched children's clothing line that puts a smile on her face.

"For me, it's just something I enjoy doing. I love to design," the New York Daily News quoted her as saying.

The stunner's 'Truly Scrumptious' kid's clothing line, which previewed on Wednesday, at Babies 'R' Us at Union Square is set to launch on September 15 and will feature her own designs for stylish newborns and children up to age five.

The collection "isn't necessarily something that improves earnings," she said.

"I make a lot of money when I do a modelling gig. And it's much easier. I show up for one day, and I twirl around and smile for the camera."

"I love being creative," Heidi added.

Sofia Vergara has said that she is grateful that she still makes heads turn, even at 40.

"I think that would be ungrateful if I were upset because I'm seen as attractive or sexy," the New York Post quoted her as telling the Hollywood Reporter.

"That's opened so many doors for me in my life."

"I'm 40 years old, and I love that people still think of me as sexy and as hot. It's very flattering," she added.

Vergara got engaged to businessman Nick Loeb in early July, as she celebrated her 40th birthday with friends and family in Mexico.

Wild child Kate Moss was spotted flashing her breasts as she partied topless on a luxury yacht during her holiday in St Tropez.

The supermodel was seen enjoying the sunshine on French pal and magazine boss Jean Yves Le Fur's boat, the Sun reported.

The 38-year-old, who sported just a pair of black bikini bottoms, was laughing and joking with pals as she topped up her tan.

The mum-of-one was also snapped baring her assets as she leaped into the sea.

Jennifer Aniston's yoga instructor Mandy Ingber has offered the physical (and mental) health tips with which the actress has been able to maintain her fabulous figure.

"(Yoga) tones muscles and stretches and opens the body for more freedom and mobility," Celebuzz quoted her as saying.

"Connection to breath reduces stress and therefore increases health benefits," she said.

Milestone moments such as wedding days could be stressful enough without having to worry about working out.

But yoga can help de-stress while also helping to get toned -- making it a useful regimen leading up to the marriage altar.

"Cardio is beneficial for the heart as well as for burning fat."

"When you change the ratio of stored fat to lean muscle mass, your metabolism is increased and you burn more just standing in line at the grocery store check-out line," she said.

The yoga trainer and mastermind behind the Yogalosophy DVD and Yogalosophy: 28 Day Mind Body Makeover has stressed on the importance of finding a workout that is tailored specifically for each individual.

"I think people should choose what feels good to them and what motivates them. The idea of choosing one over the other isn't really an issue," she said.

"Any exercise is good if you enjoy it. I personally believe that the way you do things and the attitude you have has a great effect on the result."

"If you love full body movements, and connecting with your core as you move the overall body, then yoga just may be your thing. It's surprisingly challenging," she added.

Aniston, who appears in Ingber's Yogalosophy DVD, makes note of the drastic changes that regular yoga practice has had on her overall wellbeing.

At 43-years-old, the former Friends star seems to be in the best shape of her life and only getting better with age.

Fitness fanatic Madonna is set to share her best workout routines with fans in a range of workout DVDs.

The 54-year-old Material Girl is known for her muscly arms and toned physique, and she has so far opened branches of her Hard Candy gym chain in Chile, Russia and Mexico.

She has teamed up with her trainer Nicole Winhoffer for the new project, a series of releases, which will feature dance moves and a variety of fitness routines to promote agility, flexibility, and strength.

The first Addicted to Sweat DVD will hit US retailers on September 5.