Last Night's Look: Hit or Miss?

Vote on this week's styles including Fergie, Katy Perry more stars! You decide – are they fashionistas or flops?

MICHELLE TRACHTENBERG

Michelle is as light as air in a ruched, lilac Marchesa confection with gilded accents, an antiqued Marchesa clutch and David Yurman earrings at the School of American Ballet Winter Ball in N.Y.C.