Last Night's Look: Hit or Miss?

Vote on this week's styles by Blake Lively, Mariah Carey and more stars! You decide – are they fashionistas or flops?

HAYDEN PANETTIERE

The star makes sure to sizzle at the Spike TV Guys' Choice Awards in L.A. in a sparkling micro-minidress, sky-high heels, crystal clutch and tousled blonde waves.