We know from previous red carpets that Leighton doesn't play it anywhere near as safe with style as her small screen alter ego Blair Waldorf. But on a night when nearly everyone was taking a fashion risk, hers (sexy sheer paneling and suede booties) finally worked.
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BEST MALIN ACKERMAN
Yes, the sexy white suit has become a red carpet cliche, but the hints of ice blue — from her earrings to her bustier — help keep the Watchmen star looking cool.
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WORST VANESSA HUDGENS
Since when did self-tanner become a desirable color to dress oneself in? Besides which, we're not crazy about the slinky cut and ragged hem of the HSM star's (night)gown.
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BEST ASHLEY GREENE
Doing her franchise proud, the Twilight star vamped it up with blood-red lips and one hot bustier dress.
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WORST LAUREN CONRAD
While jumping ship on The Hills did L.C. also pull the ripcord on her dress? Otherwise there's no excuse for her terribly awkward ruching — or her terribly ratted out hair.
Now here is a lesson Beyoncé could stand to learn: Brocade is best when served in ultra-mini amounts. (And with that much leg on display we suppose the Transformers star could be forgiven for thinking no one would notice her oddly slicked-back hair.)
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WORST TARAJI P. HENSON
While we appreciate that the always chic Oscar nominee wanted to go edgier for the MTV crowd, there's a big difference between fresh and French maid's costume.
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BEST SIENNA MILLER
It's possible that Miller nicked her shoulder pads straight off Alexis Carrington, but her backless sequined dress — and dazzling smile — brought some welcome sparkle to the night.
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WORST CAMERON DIAZ
Cam loves to go cazh — and usually we're a fan — but there's nothing about this ensemble, from 80s top to blue suede shoes, worth cheering. Might we suggest that Diaz take a style cue from her very cute costars?
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SPLIT DECISION MILEY CYRUS
We would applaud the oft-bedazzled star for trying something different with this sophisticated halter — if her nude pumps didn't make this look so Hannah Montana Goes To the Office.
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SPLIT DECISION SANDRA BULLOCK
While it's nice to see Miss Congeniality back on the carpet — and in an adorably speckled asymmetric mini — couldn't she have left the not-so-seasonal tights at home?
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SPLIT DECISION KRISTEN STEWART
The dress with its fierce pebbling and criss-cross strapping wants to wow the crowd — but the black Converse want to have stayed at home. (Though if reports that the Twilight star had to trade in her heels due to a twisted ankle are true, we hereby name Stewart an honorary best.)