Worst: Leigton Meester

Peek-a-boo! We see you! Maybe this butt-bearing dress was Leighton's brave attempt to distance herself from Blair, but we're not so sure that this Emilio de la Morena dress is the way to do it. Booty-cleavage is best left for bathing suits on remote seashores, not a red carpet event. Pairing the look with Brian Atwood's purple suede boots only made her look short and frumpy. She's neither the Queen Bee nor the Queen of the RC, this time.

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