Last Night's Look: Love It or Leave It?Check out the head-turning outfits Britney Spears, Kate Hudson and more stars were just spotted in! Then decide – fabulous or fashion fail!

SIENNA MILLER

For her first post-baby red carpet appearance, the actress channels Gwyneth in a minimalist cream column with attached cape, plus dramatic golden cuffs and a cute lips clutch, at the Hamptons International Film Festival in Sag Harbor, N.Y.