Last Night's Look: Hit or Miss?

Vote on this week's styles including Sienna Miller, Nicole Richie and more stars! You decide – are they fashionistas or flops?

TAYLOR MOMSEN

Gossip Girl's youngest star channels '90s grunge in an asymmetrical hem plaid dress, accessorized with piped peep-toe ankle boots, a black-beaded rosary, a mix of bracelets and bold red lips at a Sephora store opening in New York's Times Square.