Kim's saucy swimsuit pic 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 glamour model has stripped off for PETA? Which popstar has launched the world's first black perfume?

Here's the lowdown on the latest fashion news!

Kim Kardashian flaunts trim waist in skintight swimsuit

Kim Kardashian shared a sexy behind-the-scenes photo via Instagram on Sunday.

Wearing a skintight swimsuit that accentuated her trim waistline and supple cleavage, the 31-year-old socialite sat on her famous derriere while participating in a new photo shoot.

She captioned the raunchy picture "Good morning Miami".

In March, after losing 10 pounds in 10 days, Kardashian unveiled her best bikini body ever when she visited the Dominican Republic with her family.

"I went gluten-, dairy- and sugar-free," Us Magazine quoted her as saying.

The reality TV star used Sunfare's 1,300 calorie-a-day meal-delivery programme and "ran on the treadmill every day".

Just about 15 days after she modelled their diamante line, Luisana Lopilato is facing the lens once again as Ultimo lingerie's brand ambassador.

In this latest campaign, the 24-year-old Argentinian wife of singer Michael Buble shows off two sets of lacy, Oriental-inspired gel-fitted bras and briefs, available in fuschia pink and black, the Daily Mail reports.

Michelle Mone OBE, creator of Ultimo was quoted as saying: "Luisana looks absolutely stunning in our new lingerie; almost doll like. It's easy to see why she's voted one of Spanish FHM's sexiest women time and time again."

Luisana also commented on the new collection, saying, "The colour pink is great, it's sexy but girly. The fitted gel makes your cleavage look incredible!"

The lingerie giant has seen a record spike of 37 per cent in sales since the blonde bombshell signed on.

British glamour model Jessica-Jane Clement has stripped off completely for a new PETA advert to rally against animal testing.

The Real Hustle star has helped promote the new campaign by revealing her bare skin while she writhes around on the floor with a bunny named Sammy.

In both of the shots, the words "No bunny should suffer for beauty" are scrawled across the poster.

Clement can be seen lying on her back with her legs in the air and her curves suggestively displayed as she smoulders at the camera.

She carries the brown and white bunny while the rest of the advert reads: "Don't delay the EU cosmetics test ban."

In the other picture, her derriere can be seen as she carries the bunny over her shoulder and her body is reflected in a mirror. But she contains her modesty by placing her leg in the way.

Clement is actively trying to urge the European Commission not to abandon the 2013 deadline for ending the sale of animal-tested cosmetics across the European Union.

The new ads are part of PETA's campaign to urge the European Commission not to bow to pressure from the cosmetics industry and postpone or compromise the 2013 deadline for banning the sale of all cosmetics containing ingredients tested on animals.

And it's obviously something that means a lot to the Celebrity Big Brother star, as she uses her body to get the message across.

"Men are now embracing their feminine side, which has meant a boom in the male grooming industry, and girls are starting to use makeup younger than ever before," the Daily Mail quoted her as saying.

"With such a high demand for cosmetics, it's important to ensure that demand for beauty products doesn't mean animals dying."

"Testing on animals isn't necessary -- many companies don't test at all. That means no company should profit from it, and I think doing this campaign will show people how important this ban is," she added.

Clement joins a growing list of celebrities, including Pamela Anderson, Paul McCartney, Ricky Gervais, Kimberly Wyatt and Alicia Silverstone, who have urged the European Commission to uphold the cosmetics testing deadline.

Scarlett Johansson has said that her appearance has occasionally impacted on her career, causing her to miss out on roles she coveted because she is thought of as "too sexy."

She is the smouldering glamour queen of Hollywood, but Johansson says that her good looks aren't always the best asset.

"That has happened to me before, yeah. That's always an unfortunate thing to figure out. 'Why can't you see?!' For me, I would imagine casting someone, you would want to challenge yourself in some way," the Daily Mail quoted her as saying.

"It is so interesting to see actors transform. There are certainly plenty of times when I am definitely not sexy," she said.

Despite her complaint, the 27-year-old actress admitted taking care of herself and said that the secret to her looks are staying healthy, but not being too strict with herself when it came to diet and exercise.

"I live a relatively healthy lifestyle I think. Ish. I'm not overly strict. I like to go out and enjoy myself and drink a couple of glasses of wine and stay out late occasionally and eat a slice of cake," she said.

"I work out and eat well most of the time and try to get some rest. (I eat) lots of kale. I try to stay away from meat and dairy and (all) that," she added.

Director Cameron Crowe had been able to see past Johansson's famous curves and pout, when he cast her as zookeeper Kelly in We Bought A Zoo, which will be releasing on DVD this week.

Model-turned-actress Rosie Huntington-Whiteley is showing off her heavenly body yet again.

The twenty five-year-old British beauty graces the August cover of Germany's GQ Magazine in nothing but her innerwear, the Daily Mail has reported.

With a glamorous, blood-red pout and her mane in tousled beach waves, her fabulous curves are highlighted in the pair of white briefs, with the number 10 emblazoned across the bottom.

Rosie is also expected to make a temporary return to the world of fashion at the closing ceremony of the Olympics in London next month.

Lady Gaga has created a buzz by stripping down and posing naked to promote her new fragrance, Fame.

The ad campaign features the 26-year-old singer in a black face mask and nothing else, ABC News reported.

As she lies sideways holding her perfume, what appears to be an army of tiny men, resembling spiders, climb her body, placed strategically to cover her private areas.

The black-and-white photo, shot by Steven Klein who has also worked with the Judas singer's rival Madonna, was tweeted by the popstar on Monday, along with a note indicating that even she had her limits when it came to exposure.

"I won't lie I'm a bit nervous. It's been a while since Ive shared some work with you. But I'm so proud of Steven (Klein, the photographer) +I, we really did not sleep!" she tweeted.

The attention-grabbing photo comes after her controversy-generating 'The Born This Way Ball' world tour that saw her angering her fans in Thailand, when she cancelled a show in Indonesia after threats of violence and protests.

It was in Australia last year that Gaga told the nation's popular radio programme The Kyle and Jackie O Show that her signature scent will be smelling "like an expensive hooker."

"(Blood and semen) is in the perfume, but it doesn't smell like it. You just get sort of the after feeling of sex from the semen and the blood is sort of primal. And the blood was taken from my own blood sample, so it's like a sense of having me on your skin," she said.

The scent, billed as "The First Ever Black Eau de Parfum," is a black liquid that turns clear once it is sprayed.

The description on the purple and black bottle lists the fragrance's ingredients as "tears of belladonna, crushed heart of tiger orchidea with a black veil of incense, pulverized apricot and the combinative essences of saffron and honey drops."

She will also debut a television commercial and three-minute film to promote Fame before it hits beauty counters this September.

Miranda Kerr's recent suggestion that epidurals negatively impact a baby at birth has sparked a heated debate on parenting blogs.

The wife of actor Orlando Bloom said that she decided to opt for a natural birth without any pain medication after watching baby-bonding videos.

According to ABC News, the Victoria's Secret model noticed in the videos that babies born to mothers who did not have epidurals "come out and go straight for the mother's breast."

But that, "(The video) showed ones (babies) right after the epidural, and that didn't happen. The baby was a little bit drugged up, and I was like, 'Well I don't want that.' I wanted to give him the best possible start in life I could."

A commenter on Cafe Mom's The Stir blog wrote, "Being a supermodel doesn't make you an expert," and that Kerr should, "choose her words more wisely," the New York Post reported.

Others are backing Kerr's opinions, with one blog posting, "The babies are drugged up when you receive an epidural...do your research."

Kerr, 29, gave birth to Flynn in January of last year.

Rihanna is trying her hand as a fashion designer by creating her very own "street to chic" clothing line for British High Street chain River Island.

The 24-year-old R&B singer's first capsule collection will be going on sale in stores from spring 2013.

According to reports, the singer was going to work with the company after she had been spotted visiting the chain's head office in London in March and she has now admitted that she's wanted to become involved in fashion for a while.

"I've been wanting to design my own collection for some time," the Daily Mail quoted her as saying.

"River Island is the perfect partner for me to collaborate with and working with a British, family-run business also really appealed to me."

"I find London really inspiring and River Island loves to have fun with clothes. I'm looking forward to working with them and creating something really special," she said.

The clothes and accessories in the popstar's line have not yet been finalised, but River Island chief executive Ben Lewis said that the range will reflect her "street to chic" style.

"We are thrilled to be collaborating with Rihanna and to be the first fashion brand to work with her in this way," Lewis said.

"Rihanna is a style icon, from street to chic she enjoys her fashion. As soon as we started to work together we knew this was a perfect fit."

"Rihanna will be designing the collection and we will be sharing our fashion experience with her to develop a range her fans will love," he added.

Kate Moss has become the subject of a coffee table tome, which is edited by her former partner Jefferson Hack, dedicated to her incredible body of work over the last 20 years.

Set to be published by Rizzoli in November Kate: The Kate Moss Book has been edited by her former flame and close friend and casting director Jess Hallett, the Telegraph reported.

Moss has had a hand in the creation of the volume too, personally selecting the images she wanted to be included in order to create a publication that "spans the entirety of her unparalleled career, from model to fashion designer, and muse to icon."

Including photographs by the likes of Hedi Slimane, Juergen Teller, Terry Richardson, Mario Testino and Karl Lagerfeld, the book follows Moss from her first published photographs taken by Corinne Day for The Face in 1990 and her iconic campaign for Calvin Klein, to the fashion behemoth she is today.

The book will be available from November 6 for 50 pounds.

Gisele Bundchen poses nude on the beach in the new issue of Vogue Paris.

The 31-year-old put her Brazilian curves on display in all their glory in the provocative black and white frame, and also posed topless in the sand while wearing only aqua bikini bottoms.

The mother-of-one, who is married to Tom Brady, also put her tanned and toned body on show in a black and gold bikini and modelled a series of other skimpy outfits.

In each frame, Bundchen, who has been modelling for more than 15 years, can be seen pouting for the camera with her caramel-coloured hair perfectly dishevelled, the Daily Mail reported.

The shot was clicked by photography duo Inez van Lamsweerde and Vinoodh Matadin for the June/July issue of the French fashion magazine.

The model recently topped the Forbes Rich List for the seventh year running.

She is said to have earned 45 million dollars over the last year alone, with an estimated net worth of 250 million dollars.