Wedding Guest Style: Would You Wear These Looks?

Leighton Meester's mini, Rachel Bilson's backless dress, Cat Deeley's white suit – are these stars' red carpet outfits appropriate to wear to a wedding? Vote now

CASUAL DAY DRESS

Gabrielle Union balances her simple, printed shift with a tan belt and flat sandals for a daytime event in L.A., but even if it's a ceremony by sunlight, is it still too laidback for a wedding?