Last Night's Look: Love It or Leave It?Nicole's ab-baring gown! Lupita's ab-baring dress! See all the creative ways stars are baring their skin, plus more outfits that stars were just spotted in. Check them out, then vote – fashion-forward or fashion fail?

KIM KARDASHIAN

Here to answer your pressing question of what to wear when you attend the Vienna Opera Ball with your mother is Kim Kardashian: a dramatic Ralph Rucci gown comprised of a mostly-sheer black halter and a nude skirt with see-through stripes (one of which shows off the undies).