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

PIPPA MIDDLETON

Pippa's ready to party, promoting her event-planning book in London wearing a sheath with a flared skirt, chandelier earrings and those signature sensible pumps the Middletons are so fond of.