Best Dressed 2013

High-Fashion Faceoff: Runway vs. Red Carpet

See how Madonna, Miley Cyrus, Beyoncé and more stars put their own spin on designs sent down the runway – then vote on who styled the looks best

KEIRA IN VALENTINO

Some stars might see a model in a sheer design and say, "I'll take it, but add a lining." Knightley is not one of those stars. She maintains the lingerie-revealing look of the black-and-gold gown, though opts to make it every so slightly less see-through.