Last Night's Look: Hit or Miss?

Vote on this week's styles including Blake Lively, Rachel McAdams and more stars! You decide – are they fashionistas or flops?

NICOLE RICHIE

"I feel smarter already," Nicole joked of the new brunette shag she debuted at the holiday collection launch of her House of Harlow 1960 jewelry line. The designer played up the new look in a white strapless L'Wren Scott frock, exotic platforms and arms stacked in her own bangles.