Who wore it best?

Cameron Diaz vs. Pippa Middleton

Back in 2009, Cameron Diaz teamed this hot red Alexander McQueen gown with vertiginous Salvatore Ferragamo heels and an up do for the Golden Globes - and won critical approval for her bared-back, sexed up style.

So who would've believed that, two years later, we'd see the same dress - albeit slightly modified - sashaying down the aisle at the most celebrated royal wedding in decades? Pippa Middleton is the most unlikely style crush to have come out of the occasion (we already loved The Queen, FYI).

WINNER: It has to be Pippa. Not only was the occasion momentous, but the rear view of her in this dress is now an internet phenomenon. Respect!

Rose McGowan vs. Kate Middleton

Rose McGowan dazzled in this hot pink Issa dress at this year's SAG awards, styling it up Studio 54-style with sexy loose waves and a chunky cuff.

Kate Middleton's Issa obsession is well-documented, so it's little wonder that she was also spotted rocking the same dress before she was a married woman. Kate paired hers with a black clutch bag, diamond earrings and, unsurprisingly, a more conservative neckline.

WINNER: Tough one. But this dress was made for turning heads, so it's Rose's out-and-out 'look at me!' take on it that wins out for us.

Katherine Jenkins vs. Brooklyn Decker

Katherine Jenkins loves a bit of Victoria Beckham, so we were pleased to see that this gorgeous caramel fitted dress (which features a zip full down the back) made the cut when she attended an event at the Royal Albert Hall in March.

The dress was also the dress of choice, however, for US starlet Brooklyn Decker, who wore it to Country Music Awards in Las Vegas. Check those curves!

WINNER: While it's impossible to choose between the girls in the dress itself, Brooklyn just edges this one on account of her shoes - Katherine's look a little clumpy and uninspired in comparison - and that divine, directional bob.

Abbie Cornish vs. Chelsea Clinton

Aussie actress Abbie Cornish played it safe on the red carpet at the premiere of her new film, Limitless, last month. You can't go far wrong in an LBD - especially if it's current season Lanvin. She kept the rest of her look understated with a black clutch and heels, and a classic gold watch.

Chelsea Clinton had exactly the same idea back in December - she wore the same dress for The Clinton Foundation's Millennium Network Event in LA with thick black tights and, interestingly, even less jewellery than Cornish.

WINNER: Congrats, Abbie! We think this dress calls for bare legs to show it off to its full potential, so you've got it spot on.

Christine Bleakley vs. Zara Phillips

Christine Bleakley pulled out all the stops at the premiere of her film A Turtle's Tale, rocking this leather-trimmed Burberry trench coat - which would set you back an eye-watering £1,895, fashion fans - with black jeans and V-cut shoe-boots by Christian Louboutin.

Not normally known for her fashion cred, royal yoof Zara Phillips impressively beat Bleakley to the punch by a week, debuting the very same coat with thick black opaque tights, strappy Burberry heels, shades and a beret to the Cheltenham festival.

WINNER: You're always going to look great in a design like this, so it's Zara's military-inspired super-styling does it for us. Sorry, Christine!

Rosamund Pike vs. Alexa Chung

Talk about out of this world! Rosamund Pike snaffled this Christopher Kane galaxy-print dress back in January for the New York premiere of her new film, Barney's Version, teaming it with a simple pair of black opaques, black heels and a red carpet-ready box clutch.

Trendsetter Alexa Chung was quick to hop on the extra-terrestrial bandwagon, rocking exactly the same look - right down to the mussed-up hair and black tights - to the NME Awards last month.

Winner: It's near impossible to separate the two - but we're handing this victory to Rosamund for getting into the spirit with that amazing orb ring.

Kate Beckinsale vs. Amanda Peet

Kate Beckinsale wore this Nina Ricci lace confection in pink to an LA screening of Nowhere Boy last September. Keeping her hair and make-up pared back, she teamed it with simple nude peeptoes and a bronze clutch to set off her California glow.

Almost exactly six months later, Amanda Peet rocked the white version to the Independent Spirit Awards - putting a wintery spin on it by adding sheer black polka-dot tights and black peeptoe Mary-Janes.

Winner: Kate's relaxed, sunny take on this look wins hands down for us. Amanda's harsh black accessories, though not awful, seem to detract from the prettiness of the dress.

Lindsay Lohan vs. Kelly Osbourne

This Alexander Wang denim and leather jacket has been a mainstay in Lindsay Lohan's wardrobe for a couple of years. Here, she gives it another airing in LA with a trusty pair of leggings and white T, accessorised with teetering brown platforms, sunnies and a panama hat.  

Kelly O had the same idea earlier this month, throwing on her Wang over a white T and black trousers - but upping the glam stakes into the bargain with Monroe-esque waves and a slick of red lipstick.

Winner: Lindsay just can't compete with sheer fashion force of Kelly's immaculate styling. Kelly wins!

Pixie Geldof vs. January Jones

Pixie Geldof went dotty at the House Of Holland show at London Fashion Week. Literally. Never one to do things by halves, she teamed her navy wide-leg Topshop trousers with a matching blouse  - and came off looking quite fabulous, actually.

Across the pond, January Jones dressed down her Topshop purchase with black boots, a denim jacket and a plain knit as she headed to her car in LA last week.

Winner: Controversial, we know, but Pixie has wowed us here. (Though to be fair to January, probably couldn't look bad even if she tried.)

Kate Beckinsale vs. Kim Kardashian

At last year's Cannes Film Fesitival, Kate Beckinsale looked every inch the movie goddess as she took to the red carpet in this elaborately-pleated Nina Ricci gown. Those glossy, honey waves and chandelier drop earrings are pure A-list.

Nine months down the line reality TV hottie Kim Kardashian had the same idea, wearing the gown to a Golden Globes after party - albeit with slightly more dramatic styling in the hair and make-up department.

Winner: Kate is blowing away all the competition this month! It's a close call, but her more natural styling gives this stunning dress more room to shine.

Olivia Palermo vs. Chloe Green

If there's a Topshop hero piece to be had, you can guarantee that Olivia's going to be the girl to bag it. She - somewhat controversially, it has to be said - teamed this stand-out maxi skirt with a chunky jumper and tan belt to sit front row at the London Fashion Week spring/summer 2011 shows.

...But she has competition in the way of Chloe Green, whose papa actuallyownsTopshop - tough break, Olivia. Just a day later, she stole Olivia's style thunder by wearing the same distinctive skirt with a faux fur-shouldered jacket and long-sleeved navy T.

Winner: It's a victory for Chloe! We see where Olivia was going with this but, when it comes to the crunch, we just don't think she pulled it off.

Brooklyn Decker vs. Tess Daly

Brooklyn Decker took to the red carpet in Germany for her flick Just Go With It in this showstopping split-leg purple jumpsuit by Max Mara, which she teamed with strappy coral heels and a dischevelled up-do. We don't blame her for pulling out all the stops - co-star Jennifer Aniston was also in attendance...

Proving herself to be a bit of a Max Mara obsessive, Tess Daly wore the same design to this year's Brit Awards (it's one of a handful of Max Mara pieces she's been seen in of late). Here, she added a Grecian twist with a silver arm cuff and plaits, plus closed-toe silver heels.

Winner: Brooklyn gets our vote. Such a strong design calls for pared-back styling, and we can't get enough of that colour pop at the heel.

Cheryl Cole vs. January Jones

The Versace dress Cheryl wore for the National Television Awards just a couple of weeks ago had the best of both worlds: a conservatively chic front panel, and an über-sexy, ultra-revealing cut-out back.

But this dress had already had its A-list moment, worn by January Jones to a fashion industry party back in November last year.

Winner: January's up-do really lets the detail of this dress shine through. A rare loss for Cheryl!

Katy Perry vs. Ashanti

It was an unusually tame look for quirk queen Katy Perry, but she still looked stunning in this floor-length, metallic print Issa gown at a charity benefit in December. Loving the side-swept locks, Katy.

But, just a month before, another pop princess had already debuted the very same dress. Ashanti sported hers on the red carpet of a New York awards ceremony, with a half-up, half-down 'do.

Winner: Since both girls steered clear of heavy accessories, it's the hair and make-up that will win this round - and Katy's pink lips, smoky eyes and to-die-for beachy locks are the clear victors.

Nicole Richie vs. Ellen Pompeo

Exactly a year later, Grey's Anatomy actress Ellen Pompeo got her hands on the same dress for another Vegas party. The way she wore it? With black tights and black heels, just like Nicole!

Winner: We'd have preferred to see both ladies sans tights, but nevertheless we reckon this gold beauty fits better with Nicole's natural, boho aesthetic than with Ellen's. She is the designer, after all...

It's pretty handy designing your own collection, because it means you get to wearexactly what you want all the time! Nicole Richie was doing just that way back in 2009, when she donned this sparkly Winter Kate number with black tights and YSL heels for a New Year's Eve party in Las Vegas.

Kerry Washington vs. Kate Middleton

Gorgeous actress Kerry Washington is famed for her ultra-pretty red carpet choices - and this creamy Temperley London dress was no exception.

But there's more than one way to wear this piece, as Princess Kate Middleton proved last Christmas matching it with a traditional blazer and sheer tights.

Winner: If this were a hair contest, Kate would win hands down, but those dated sheer tights means she loses out to Kerry in the style stakes on this one.

Claire Danes vs. Jaime Winstone

We thought this nude, criss-cross gown couldn't get any more gorgeous when we spotted it on Claire Danes at 2004's Costume Institute Gala...

...until Jaime Winstone rocked it even better at last year's BAFTAs with a retro hair 'do and strong make-up.

Winner: Jaime's bags of attitude and daring beauty look are what won us over this time.

Audrina Patridge vs. Khloe Kardashian

Tumbling curls and a single bracelet were all the accessories Hills star Audrina Patridge needed to rock this rich red Alexander McQueen gown on the red carpet for the series' season 4 finale in 2008.

Fast forward to last month, and fellow reality TV star Khloe Kardashian dug the same dress out of the archives for the People's Choice Awards, this time in light dove grey.

Winner: Khloe's colour choice was pretty, but there's no beating Audrina's va-va-voom red.

Kim Kardashian vs. Drew Barrymore vs. Mary J Blige

Does Kim ever look anything short of H.O.T.? This metallic Malandrino dress (which she had shortened from the runway version) played right to her strengths, emphasising her fabulous curves and perfectly contrasting her peachy skintone.

Next up in the Malandrino frock-off was Drew Barrymore, who wowed onlookers at the Going The Distance premiere with a dip-dyed 'do and ultra-cool golden accessories.

Being a personal pal of Catherine Malandrino clearly has its upsides: Mary J got to rock this metallic number with strappy golden sandals at a party at New York's Cipriani restaurant.

Winner: Drew might be one of our biggest girl crushes, but despite our bias, we still reckon her choice of belt and jewels adds that extra edge to her get-up.

Drew Barrymore vs. Rachel Zoe

We had to give Drew Barrymore a triple DO when we spotted the way she wore this Janine dress at a Nylon party in August. From the dip-dyed hair and the peachy cheek blush to the knuckle duster ring and her suede heels, what's not to like?

But we forgot we'd been less impressed with Rachel Zoe's take on it over a year ago in November 2009 - those thigh-high boots really aren't working for us.

Winner: Rachel might be a stylist extraordinaire (and a force to be reckoned with in the fashion industry), but even she's no match for Drew's never-ending cool.

Isla Fisher vs. Juliette Lewis vs. Christina Aguilera

Mum of two Isla chose this on-trend brocade dress by Dolce & Gabbana for an appearance at last year's London Film Festival, styled up with a retro velvet jacket and sheer tights...

...while rock chick Juliette Lewis preferred to let the dress do the talking with only scarlet nails and lips to keep it company...

...and Christina Aguilera came over all matchy-matchy on her promo tour for latest flick Burlesque by pairing the D&G number with a coordinating cardigan, belt, nails, heels and lipstick.

Winner: Christina's red 'n' black look is a bit OTT, and while Isla looks adorable, in a toss up between her sweetheart style and Juliette's sexbomb look, Ms Lewis wins every time.

Kelly Osbourne vs. Natalie Portman

Kelly Osbourne rocked this Christian Dior dress the Hollywood bombshell way at the American Music Awards in November last year: with a cinched-in waist, platform peep-toes and big, BIG hair.

But nearly six months before, the lady du jour Natalie Portman had worked a super sweet pink version for the AFI Lifetime Achievement Awards.

Winner: It's gotta be Kelly - Natalie's pretty in pink look is no match for her va-va-voom.