1 of 30
CAMERON VS. TAYLOR
The paired her sweet Jenny Packham frock with loose locks on American Idol in April, while the opted for pinned-up curls at a CMT event.
2 of 30
SARAH MICHELLE VS. DIANE
The former Buffy got glam in a flirty Chanel frock back in 2007, while the German stunner lost the overlay at a Chanel show in Paris this month.
3 of 30
ISLA VS. CHRISTINA
Better off red! While both stars beat the chill by pairing their Dolce & Gabbana dresses with tights and blazers, grabbed a clutch in London, while added a belt in Madrid.
4 of 30
MICHELLE VS. MARIA
The actress kept her Alice + Olivia floral-print simple at the Blue Valentine N.Y.C. premiere, while the TV host added nude pumps and a pretty headband at a party for the line.
5 of 30
MALIN VS. CHERYL
The actress struck a dramatic pose in J. Mendel at the Toronto International Film Festival, while the X Factor judge made a glamorous turn on the TV show.
6 of 30
KRISTIN VS. ANNALYNNE
went out in style in a cut-out Donna Mizani frock and sandals while filming the last season of The Hills, while the 90210 star showed off her toned figure and kept the focus on the frock with simple pumps.
7 of 30
KATE VS. HILARY
The was cosmically inclined in Acne’s celestial tee, which she wore with a blazer and chain-strap bag for dinner in London, while the took a more casual approach in a different version of the starry shirt, pairing it with leather leggings and a cozy scarf.
8 of 30
HALLE VS. PARIS
Fangs for the memories! The Frankie & Alice let her tee do the talking when running errands in L.A., while gave a toothy grin in her Wildfox Couture sweatshirt, which she paired with a cozy robe and relaxed tresses.
9 of 30
ALESSANDRA VS. WINONA
The Victoria’s Secret babe was on model behavior in her striking, full-skirted Dolce & Gabbana frock, which she wore with a simple gold necklace, while the Black Swan amped up the drama in strappy pumps, drop earrings and dark eyeliner.
10 of 30
ANNA VS. CAREY
One fierce faceoff! The Vogue editrix prowled the streets of Paris in an animal-print Lanvin frock, which she wore with nude peep-toes and a salmon sweater, while the Wall Street: Money Never Sleeps star glammed it up with caramel platform pumps and a stunning statement necklace.
11 of 30
RIHANNA VS. EMMA
toned down her typically Loud style in her gray Vince sweater while out in N.Y.C., while the Harry Potter paired hers with a relaxed buffalo-check top en route The Late Show with David Letterman.
12 of 30
JENNY VS. EVA
accentuated the sexy one-shoulder silhouette by pulling her hair up for the American Music Awards, while maximized her Stella McCartney with eye-catching gold accessories at the MTV Movie Awards.
13 of 30
WINONA VS. REBECCA
The Black Swan showed off her assets in a corset top and circle skirt from Louis Vuitton at the Toronto premiere of the film, while the British actress kept her ladylike dress simple at the Evening Standard Theater Awards in London.
14 of 30
VANESSA VS. OLIVIA
Beautiful in beige! The newly engaged wore nude pumps and a down do to complement her Alice + Olivia by Stacey Bendet dress while filming Good Day New York,, while the TV host dressed hers up with strappy gold sandals at a L.A. event.
15 of 30
KOURTNEY VS. COLBIE
We’re seeing a pattern here! Kourtney added simple black pumps to offset her French Connection mini while out in West Hollywood, while the “Bubbly” singer opted for bow-embellished peep-toes at a L.A. event.
16 of 30
KIM VS. VANESSA
The jewelry took a walk on the wild side in her Style Stalker “Snakebite” leggings and blazer, while the covered hers with boots and a jacket.
17 of 30
RIHANNA VS. DIANE
The Bajan prowled the Barbados beaches in her We Are Handsome Amazon suit and cardigan, while the actress stayed sun-safe in a scarf and fedora in Mexico.
18 of 30
HAYDEN VS. TARAJI
The Heroes star added edge to her Elizabeth and James ruffled mini with a leather jacket and bold lips, while the actress dared to bare, pairing hers with shiny gold accessories.
19 of 30
EMMY VS. OLIVIA
The Shameless star looked cozy in her cable-knit Ann Taylor cardi and boots while at the airport, while the Tron actress paired hers with a striped tee and comfy kicks in L.A.
20 of 30
LINDSAY VS. ANGIE
The Lipstick Jungle actress wore her Naeem Khan frock with a geometric clutch, while the Rizzoli and Isles star amped up the drama with a metallic bag and smoky eyes.
21 of 30
NICOLE VS. ELLEN
It’s the New Year’s Eve dress! The newlywed wore own Winter Kate design on Dec. 31, 2009, while the paired hers with an updo for a Vegas bash on Dec. 30 this year.
22 of 30
NAOMI VS. KATE
The Aussie cropped her Stella McCartney lace-detail jumpsuit for a N.Y.C. premiere in April, while the Private Practice star went long for a L.A. event in December.
23 of 30
TAYLOR VS. ALESSANDRA
The Speak Now dressed down her Wildfox Couture sweater with ankle booties, while the supermodel posed in knee-high boots with her “Love Potion No. 9” top.
24 of 30
BROOKE VS. KELLY
City chic! The got sexy in SoHo in her Boden coat and suede boots while the Real Housewife wore hers with velvet harem pants and flats on N.Y.C.’s Upper East Side.
25 of 30
MICHELLE VS. JENNI
The Gossip Girl star added a thin belt and metallic pumps to her IN ADD MINUS dress, while Jersey Shore’s “J-Woww” chose a wide belt and a modified Snooki-inspired pouf.
26 of 30
HILARY VS. ASHLEE
It’s in the jeans! The actress wore her J Brand “Agnes” jeans with an all-black ensemble, while the paired hers with a slouchy sweater and statement earrings – both on the same day in L.A.
27 of 30
VANESSA VS. HALLE
The newly single wore her Wildfox Couture jean shorts with a floppy hat while shopping in Malibu, while the Frankie and Alice paired hers with a long-sleeved top and metallic thongs for lunch in L.A.
28 of 30
NICKY VS. JENNA
That’s a wrap! The heiress accessorized her olive Alice + Olivia mini with a leopard clutch and gladiator-inspired heels, while the actress wore her blue version with simple jewelry and basic black pumps.
29 of 30
LIV VS. CHLOE
The went for monochromatic menswear in her Chanel sleeveless jumpsuit, black bag and brogues at a Chanel party in N.Y.C., while the style star wore the black-and-white version rolled up with boots and a coordinating clutch at a museum gala in L.A.
30 of 30
KATRINA VS. KATHARINE
The 30 Rock co-star paired her American Eagle military-inspired jacket with comfy boots and utilitarian tote while shopping in N.Y.C., while the singer sported hers with glam earrings and a bright clutch in Philadelphia.
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