1 of 30
KATY VS. CHRISTINA
Diva-off! The new worked out in January in her Wildfox Couture T-shirt, while the newly single announced her intentions this week in L.A.
2 of 30
NAOMI VS. ROSARIO
picked her raspberry Stella McCartney gown for the Met Costume Institute gala, while Dawson attended the premiere of Unstoppable in her periwinkle version of the gown.
3 of 30
EMILY VS. KELLY
The British actress kept her Marc Bouwer dress simple for a N.Y.C. bash, while the Fashion Police commentator added a belt and trench to her dress for a dinner out in L.A.
4 of 30
SARAH JESSICA VS. UMA
got into character on the set of Meet the Morgans in her L’Wren Scott dress, while Thurman hit a Longchamp party in N.Y.C. in her deep green sheath.
5 of 30
WHITNEY VS. KOURTNEY
paired her leather Rebecca Minkoff skirt with flats for a stroll in N.Y.C., while Kardashian went for full glam in her pleated mini for a day of Big Apple shopping.
6 of 30
JENNIFER VS. TAYLOR
The new American Idol paired her Wildfox Couture top with cropped leggings for a day out in Miami, while the picked black jeans for her sparkling heart sweatshirt while promoting her new album in N.Y.C.
7 of 30
KIM VS. CIARA
BFF showdown! wore her Carven dress with leopard booties in Paris in September, while Ciara replicated the look for a N.Y.C. movie premiere this week.
8 of 30
EMMA VS. ANNA
Roberts wore her cobalt Reem Acra dress to a post-Oscars bash, while Kendrick chose the turquoise version of the plunging mini for a magazine party in L.A. in October.
9 of 30
KATE VS. RIHANNA
The paired her Topshop cardigan with loose jeans for a stroll with her pooch in L.A., while the picked high-waisted cutoffs for her loose brown sweater.
10 of 30
JULIETTE VS. ISLA
The Conviction actress celebrated the film’s N.Y.C. screening in her Dolce & Gabbana mini, while the made her red carpet return in her red lace dress at the London premiere of Burke and Hare.
11 of 30
BLAKE VS. IVANKA
The Gossip Girl slipped into character as Serena van der Woodsen in her Carolina Herrera gown, while the real estate tycoon donned her blue chiffon stunner for an Elton Johns AIDS foundation event in N.Y.C.
12 of 30
CAMERON VS. ROSARIO
hit the Tonight Show in her Victoria Beckham sheath back in June, while Dawson picked her second-skin beige dress for this week’s Spike TV Scream Awards
13 of 30
HALLE VS. CIARA
The paired her Helmut Lang shearling jacket with slim black pants for a dinner out in N.Y.C., while the singer picked a luxe purse to accent her gray-and-ivory jacket for a day of shopping in L.A.
14 of 30
THANDIE VS. JENNIFER
The British beauty matched her Stella McCartney top to her fuchsia skirt at the Toronto film festival, while the American star paired her satin asymmetrical top with a shimmering white mini for a charity bash in L.A.
15 of 30
KRISTEN VS. JESSICA
The You Again star wore her Diane von Furstenberg gown to the Met Costume Institute Gala in May, while the 90210 actress picked a shorter version of the appliquéd style for an Emmy after-party in September.
16 of 30
CATE VS. JENNIFER
The Robin Hood paired her draped Lanvin dress with pointy-toe heels in September, while the showed off her fab new figure with tights and patent pumps at a November event.
17 of 30
REESE VS. LEA
got spotty in her leopard-print Anlo dress while filming This Means War in Vancouver, while later that month the Glee star wore the blue version of the ‘Jordan’ frock while running errands in L.A.
18 of 30
JULIANNE VS. COURTNEY
The Burlesque accessorized her lace gown with a metallic envelope clutch at the American Music Awards this week while singer went sheer in her Marchesa gown for an October gala.
19 of 30
EMMA VS. KARLIE
No cold shoulder here! The actress let her asymmetrical Stella McCartney frock take center stage at her Easy A premiere in September, while the model added laceup sandals for a Vogue party in November.
20 of 30
KELLY VS. JENNIFER
The singer dressed up her nautical dress with an eye-catching cuff at a November Miami restaurant opening, while the kept things beachy and breezy in her A.L.C. maxidress for a Miami Dolphins game.
21 of 30
ZOE VS. PARIS
The Avatar beauty took a walk on the wild side in her high-necked Louis Vuitton dress back in February, while the added a pair of black tights to hers at the Victoria s Secret fashion show in November.
22 of 30
EMMA VS. MILLA
Scream queen Roberts showed off her legs in a black Emilio Pucci dress at an October Spike TV event, while Jovovich opted for the same mini in white at the premiere of Stone.
23 of 30
BLAKE VS. MADONNA
The dressed down her Stella McCartney perforated boots with a button-down and blazer in January, while the went all-out glam by pairing hers with a sequined tunic at an N.Y.C. gala.
24 of 30
KELLY VS. GEORGINA
The frill of it all! Osbourne wore her ruffled Marchesa confection to the line’s show during N.Y.C. Fashion Week in September, while the designer rocked her own fantastic creation at a WWD party in N.Y.C.
25 of 30
JESSICA VS. JULIA
The 90210 babe bundled up in a military-inspired Express jacket and cozy scarf in London, while the Dexter star also kept her look casual while grabbing lunch in L.A.
26 of 30
KIM VS. WHITNEY
The hits the streets of Miami in her Plastic Island blazer over a body-con dress, while the pairs her boyfriend blazer with distressed jeans for a charity event in L.A.
27 of 30
KRISTEN VS. TAYLOR
The dazzled in her Georges Chakra Couture dress at a July award show, while the lit up the Dancing with the Stars stage in her gold mini.
28 of 30
LEANN VS. HAYDEN
The not engaged picked her beige Elizabeth and James dress for a night out in Hollywood, while the paired her green version with a leather jacket for a boxing match in Germany.
29 of 30
LUCY VS. CHERYL
The hit the Actors Fund Gala in April in her Ina Soltani dress, while the X Factor host picked her two-tone mini for a live results show of the popular British talent program.
30 of 30
LEA VS. NELLY
The Glee star kept it simple in her Hervé Léger dress at a L.A. event in April, while the singer added tights and major earrings to her bandage dress for a red carpet in Toronto.
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