Last Night's Look: Hit or Miss?

Vote on this week's styles including Diane Kruger, Rihanna, Megan Fox and more stars! You decide – are they fashionistas or flops?

LILY ALLEN

Peek-a-boo! The British singer shows some serious leg in a sheer-skirted Chanel halter gown complete with dewy eye makeup for the GQ Men of the Year Awards in London.