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

DUCHESS CATHERINE

Looking like one of (Prince) Charlie's Angels, the Duchess of Cambridge complements her retro new bangs with a pleated dress that's equally '70s-inspired at the opening of London's Natural History Museum's Treasures Gallery.