Heidi flaunts her figure 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 actress has revealed her fitness secrets? Which sex symbol singer has stripped off for yet another magazine cover?

Here's the lowdown on the latest fashion news!

Heidi Klum flaunts cleavage in lace-up dress at MTV Europe Music Awards

Heidi Klum, who hosted this year's MTV Europe Music Awards, left little to the imagination in a revealing dress at the star-studded ceremony in Frankfurt.

The mother-of-four showed off a lot of cleavage in the lace-up blue and gold studded Versace gown as she arrived on the red carpet, the Daily Mail reported.

With this year's ceremony being held in her native Germany, the supermodel was a natural choice to host the awards.

As well as the rather skimpy number she arrived in, Klum wowed the crowds in a variety of costumes throughout the evening.

Ahead of the show she revealed: "I have six different outfits from Versace that I love very much and I think for an event like the MTV awards I usually have a little bit more fun, I can be a little bit more sexy, a little more rock 'n' roll."

"So they have got me beautiful outfits, great shoes and great jewellery, but it depends how much time I have to change in between (hosting) because it's all live," she said.

Ahead of the awards, the supemodel and Korean music star PSY had been practising the Gangnam Style dance.

In a photo posted on Twitter, Klum was seen wearing PSY's signature blue suit and glasses, as she enjoyed a masterclass with him.

She admitted that she regularly performed the dance with her four children.

Rihanna has posed completely naked yet again, for an upmarket US men's magazine.

In the photoshoot for GQ Magazine, the 24-year-old singer's breasts are covered by a jacket flung over her shoulders and only a strategically placed shadowed arm keeps the Umbrella hitmaker from losing her modesty, the Daily Express reported.

Her tattoo collection is easily visible, while she wears her cropped hair simple and flat against her head.

Asked by the magazine what turned her on, Rihanna said, "I like to feel like a woman."

"I have to be in control in every other aspect of my life, so I feel like in a relationship, I wanted to be able to take a step back and have somebody else take the lead."

"I could absolutely be dominant, but in general, I'd rather...How do I say this in, like, a non-X rated version? Love makes you go places you probably wouldn't ever go, had it not been for love. But I think everybody still has their limits," she added.

Myleene Klass' lingerie line has been named the fastest selling celebrity collection.

The 34-year-old TV presenter has seen her underwear range sell out just days after it was launched with Littlewoods.

Sales expectations were exceeded by 400 per cent for the first week, the Daily Mail reported.

And with Myleene modelling her own range, it's no wonder women are flocking to snap up the bras and briefs in a bid to look like the stunning designer.

"I love working on this range. I wanted to design great looking underwear that also worked to support a women in all the right areas! I'm blown away by its success, I never expected it to take off like this!" Myleene said in a statement.

Myleene's shape first caught the attention of the public when she stripped off to have a shower in her bikini on I'm A Celebrity in 2006.

As well as the successful lingerie line, Myleene also has a womenswear collection for Littlewoods.

She is currently working on the Spring Summer range which goes on sale January 13, 2013.

Catherine Zeta-Jones has revealed that she stays slim by hula-hooping and swimming every day.

The 43-year-old actress said that she doesn't need a personal trainer, as she loves exercising and does it for at least 45 minutes everyday.

"I don't have a trainer. Crazy, right? But I don't need anyone to motivate me. I love exercise, even things like the elliptical and stretching," Contactmusic quoted her as telling InStyle Magazine.

"I'm obsessed with hula-hooping. I do it for 20 minutes a day. I don't use the old-fashioned hollow plastic kind we had when we were kids, but I discovered a new one at Danskin that's smaller and weighted."

"I'm lucky to have a pool at my house in Westchester. I do laps for half an hour a day where I can. I either work out in the house or, when I'm at our apartment in Manhattan, at an Equinox. I do at least 45 minutes a day, seven days a week," she said.

The mother-of-two also admitted that she tries to stick to a healthy diet most of the time.

"I don't deny myself food. I'm no saint. I love butter and cream, but I also eat lots of grains and fruits," she added.

British women are happiest with their breasts at the age of 26, and cite Holly Willoughby's cleavage as the curves they most covet, a new survey has revealed.

The research found women ideally want a D or DD cup -- which explains why the shapely This Morning presenter, who boasts a 34DD chest, has the country's most envied breasts.

Half of the nation's women would gladly pay to have them for themselves, with 20 per cent willing to fork out 3,000 pounds to enhance their cleavage, the Daily Mail reported.

The study, carried out by Ultimo Beauty to obtain women's views on their assets, found women are most happy with their breasts in their mid-twenties, with 38 per cent saying that was when they were most satisfied.

A wistful 28 per cent of women admitted that they thought theirs were best during their teenage years.

And the research suggests British women rate their boobs most highly when they hit 26 -- like Abbey Crouch and actresses Gemma Arterton and Lindsay Lohan.

One in seven (14 per cent) claim that they were at their best in their thirties, but it would generally seem things start heading south after women hit their late twenties.

Indeed, 35 per cent of women said the biggest concern about their chest is sagging boobs.

Cheryl Cole, 29, who says she's a 32D, came second to 31-year-old Willoughby when women were asked whose chest they most wanted.

Meanwhile, one in seven British women (14 per cent) said they would be more than happy with breasts like princess Kate Middleton.

When asked about the appeal of her breasts in 2008, Willoughby, now a mum of two, said: "We're so used to seeing size zero figures that people freak out when they see curves."

"I'm a 34D/DD and I'd never have a boob job," she said earlier.

"Good underwear's the key. I buy firm scaffolding to make sure everything's secure and safe," she insisted.

The research found that Hollywood star Marilyn Monroe still has the most iconic cleavage, ahead of former Wonderbra model Eva Herzigova.

Celebrity breasts women in UK desire are:
Holly Willoughby - 60 per cent
Cheryl Cole - 19 per cent
Kate Middleton - 14 per cent
Jessica Ennis - 5 per cent
Kate Moss - 2 per cent

The most iconic cleavage are:
Marylin Monroe - 61 per cent
Eva Herzigova - 17 per cent
Kate Winslet - 13 per cent
Liz Hurley - 8 per cent

Celebrities with the worst cleavage are:
Katie Price - 45 per cent
Jodie Marsh - 41 per cent
Gwyneth Paltrow - 7 per cent
Kerry Katona - 7 per cent

Kristen Stewart has admitted she "can't stand" actresses who are too concerned with "looking pretty in your heels."

While her time in the spotlight has seen her wardrobe evolve to incorporate more formal footwear, the 22-year-old is still regularly spotted swapping her stilettos for her trusty trainers.

Rarely caught in a full-length gown or girlish pastel shades, the Twilight star prefers dark colours and shorter hemlines, often toughened up with leather and teamed with her favourite smoky eye makeup.

And despite her seemingly ever-ascending stardom, it seems the actress has no intention of abandoning her off-beat style -- or her Converse.

"I just so wholeheartedly disagree with people who don't like what I wear," the Daily Mail quoted her as telling the Sunday Times Style Magazine, insisting a pair of trainers are better for signing autographs for fans who line the red carpet to catch a glimpse of their idols.

Stewart suggested actresses insistent on wearing heels in front of the flashbulbs got in her way when greeting fans by "walking slowly down the line," adding: "Put a pair of sneakers on."