1 of 40
KIM VS. KOURTNEY
paired a gold statement necklace with an one-arm black dress from the Kardashian sisters’ bebe collection at an event in L.A., while older sister Kourtney let the sharp-shouldered frock speak for itself two weeks later in Vegas.
2 of 40
MENA VS. JENNA
Suvari was party perfect in Las Vegas in an olive green, twisted Alice + Olivia by Stacey Bendet dress last week, while Mrs. Channing Tatum opted for a silvery version of the one-shouldered frock for a Beverly Hills bash just a few days later.
3 of 40
BLAKE VS. SELENA
added a sexy twist to her Smythe boyfriend blazer back in October with leather pants, while kept the tweed jacket casual with jeans two weeks ago.
4 of 40
RIHANNA VS. JEWEL
The went casual in her Yigal Azrouel Fair Isle sweater last year in London, while the country star belted the oversized cardigan over jeans for an event in January.
5 of 40
CHRISTINA VS. LADY GAGA
Ricci first rocked the flowing Marc Jacobs gown with crimson lips for a charity event in December, while dressed it down with an olive cap and black platform pumps two weeks ago.
6 of 40
TAYLOR VS. CARMEN
Country’s enjoyed the heat Down Under in a floral Rebecca Taylor dress last week, while rocked the flirty frock with suede boots at the designer’s runway show three days ago during Mercedes-Benz New York City Fashion Week.
7 of 40
JENNIFER VS. JENNIFER
paired her sparkling heart Wildfox Couture sweatshirt with oversized shades and leggings in Miami Beach earlier this month, while Hewitt added blue jeans and heart-shaped sunglasses to the sweet top last weekend in Los Angeles.
8 of 40
COURTENEY VS. CHRISTINA
Hollywood’s hottest showed off her enviable figure in metallic L’Wren Scott last year, while Hendricks added a crimson pout to the same sparkling sheath in September.
9 of 40
KRISTEN VS. KATHARINE
showed some leg in her white lace 3.1 Phillip Lim frock and red-hot heels last October, while added matching tights and black pumps to the sheath in New York City this week.
10 of 40
DANIA VS. MELISSA
Ramirez added tough patent accessories to her ruffled Ina Soltani dress for an event last September, while the former Dancing with the Stars contestant kept the hot pink frock sweet with diamond jewels and metallic sandals for a movie premiere earlier this month.
11 of 40
KIM VS. ADRIENNE
worked her famous curves in a one-shouldered Tadashi Shoji mini back in December, while the Cheetah Girl tried a longer version during N.Y.C. Fashion Week in February.
12 of 40
FERGIE VS. JESSICA
The went sweet in feathered Valentino for an Avon benefit last October, while Jerry Seinfeld’s wife added a hot pink broach – and lime clutch – to the frock for an Oscars bash last month.
13 of 40
ANNA VS. HEATHER
The Up in the Air star added black accessories to her tiered Dolce & Gabbana frock for the BAFTA Tea Party in January, while Graham kept it neutral from head-to-toe for a Hollywood bash this month.
14 of 40
STEPHANIE VS. LEA
Spencer Pratt’s sister got flirty in a floral French Connection frock at a private dinner in Miami, while Glee’s leading lady paired the same sweet dress with peep-toe Mary Janes for a L.A. event.
15 of 40
ANNALYNNE VS. KRISTEN
90210’s bad girl gets sexy in a cut-out Donna Mizani dress and thigh-high boots for a night out in West Hollywood last November, while the Hills rocked the one-shouldered number last week.
16 of 40
BLAKE VS. BEYONCé
The got a leg up in lace Dolce & Gabbana for a N.Y.C. movie premiere, while joined onstage in her sexy LBD.
17 of 40
MICHELLE VS. KIM
added black accessories to her ruffled Lanvin frock at the N.Y.C. premiere of Shutter Island, while Cattrall kept the white dress simple with nude pumps and an exotic clutch at the Laurence Olivier Awards in London.
18 of 40
VICTORIA VS. MELANIE
It’s a Spice Girl showdown! rocked a sharp-shoulder black gown from her own dress collection at a 2009 Oscar party, while Sporty Spice got glam in her sweeping dress at the Laurence Olivier Awards in London this week.
19 of 40
DOUTZEN VS. ESTELLE
The Victoria’s Secret model was red-hot in Zac Posen at the CFDA Awards last June, while the singer strutted the plunging gown down the runway during last month’s Heart Truth Red Dress fashion show.
20 of 40
MARIAH VS. KATHY
worked her curves in shiny Hervé Léger at the Palm Springs Film Festival, while Ireland tried a strappy style of the same bandage gown for the Oscars.
21 of 40
REESE VS. JESSICA
was hot in a pink L’wren Scott sheath last October, while flaunted her curves in a belted version of the dress this March.
22 of 40
KELLY VS. SARAH JESSICA
The was spring-ready last week in lace Stella McCartney dress, while the topped the blush frock with a white blazer from the designer two days later.
23 of 40
KIM VS. RACHELLE
cinched her Ports 1961 dress with a corset belt last summer, while Lefevre kept the draped frock simple with a white ribbon this month.
24 of 40
AMANDA VS. ADRIENNE
Bynes was all grown-up in curve-hugging Pencey last summer, while the Cheetah Girl rocked the same bandage number to a party in December.
25 of 40
CARRIE VS. EVA
The took center stage in Jean Fares Couture in December, while the actress-model sparkled in the same ball gown last month.
26 of 40
MILEY VS. JESSICA
wears her Topshop dress to dinner in Studio City, Calif., while Stroup belts the same $60 frock for an L.A. fashion party.
27 of 40
VICTORIA VS. OLIVIA
The rocked her Julian J Smith frock last year, while The City star topped the printed dress with a busy blazer for her jewelry launch party last month in N.Y.C.
28 of 40
DAKOTA VS. GINNIFER
The Runaways star looked all grown up in her satin tuxedo blazer from Zac Posen’s Target collection last month in N.Y.C., while Goodwin attended the line’s launch in the same jacket last week.
29 of 40
KRISTEN VS. MELISSA
stunned in a girly J. Mendel dress at a New Moon premiere, while George topped the frock with a matching blazer during New York Fashion Week.
30 of 40
AMBER VS. CARLA
The model-turned-actress got glam in a long-sleeved RM by Roland Mouret gown last year, while France’s First Lady looked demure at a February state dinner in the same number.
31 of 40
DEMI VS. KATE
hit a 2009 bash in her Zac Posen dress, while heated up Vegas this week in her LBD.
32 of 40
TAYLOR VS. TORI
The takes her Urban Outfitters dress on vacation in the Bahamas, while the hits a craft studio in N.Y.C. in her $58 frock.
33 of 40
PENELOPE VS. DITA
The looked ready to flamenco in her Dolce & Gabbana dress at a Paris photocall, while the burlesque dancer heated up an L.A. bash this weekend in her sheer, fringed dress.
34 of 40
ELLE VS. ANNALYNNE
The supermodel pairs her Diesel jeans with boots and a scarf for errands in London, while the 90210 star adds a sexy tank top and peeptoe pumps to her ripped jeans for lunch in L.A.
35 of 40
CHLOE VS. NELLY
Sevigny pairs her Kimberly Ovitz dress with strappy heels for a BlackBerry party in N.Y.C., while Furtado adds a girly necklace to her nude ribbed dress for the Los Premios MTV Awards in L.A.
36 of 40
ASHLEY VS. STEPHANIE
paired her Akiko Ogawa dress with booties at the 2009 Kids’ Choice Awards, while Pratt picked simple pumps for her glittering LBD at an L.A. premiere this week.
37 of 40
RACHEL VS. KATIE
mixed her prints in her Madewell tank at an L.A. party in October, while took daughter Suri out in her dotted tank in N.Y.C.
38 of 40
KIM VS. LALA
BFF showdown! filmed her reality show in Miami in her Thatcher dress, while Vasquez launched her non-profit I Heart My Girlfriends in her patterned mini.
39 of 40
HEIDI VS. AMANDA
The Project Runway topped her Elise Overland dress with a leather jacket at the designer’s fall show, while the actress kept it simple at the Clash of the Titans premiere.
40 of 40
BLAKE VS. GEORGINA
flaunted her legs at an N.Y.C. premiere in her Marchesa mini, while the brand’s creative director Chapman hit a charity runway in her own feathered creation.