Last Night's Look: Hit or Miss?

Vote on this week's styles including Gwen Stefani, Beyoncé Knowles and more stars! You decide – are they fashionistas or flops?

ROONEY MARA

The Girl with the Dragon Tattoo star goes girly in an off-the-shoulder frock (cut-out, natch!) accented with a white turtleneck and Mary Janes to visit Late Night with Jimmy Fallon in N.Y.C.