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!

HEIDI MONTAG

Meanwhile, Kristin's Hills costar does her own take on formal shorts at a Crazy Horse III gentlemen's club party in Las Vegas, pairing a sheer bodysuit with leather hot pants and strappy heels.