Last Night's Look: Love It or Leave It?Check out the head-turning outfits Selena Gomez, Kristen Stewart and more stars were just spotted in! Then decide – fabulous or fashion fail?

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KEIRA KNIGHTLEY

In a sumptuous, rosette-embellished evening gown with sheer sleeves and coordinating Rupert Sanderson pumps, the Anna Karenina star gets us excited for the film's lavish costumes at its London premiere.