We all appreciate sexy lingerie, but we don't all have the guts to show our sexy lingerie to the world. Except for Lily Allen. The singer started out performing a show in London wearing a buttoned-up black blazer with lace sleeves. Into the show she unbuttoned her blazer and what did fans see? A black, sheer, lace teddy . . . and her nipples! Lily is known for being quirky, but I doubt they saw this one coming. What do you think — is it tacky or all part of the show?