Celebrity Trip Nips!

songstress Lily Allen shocked viewers and guests alike on British comedy show Friday Night Project when she flashed her nipple—her third nipple.

After watching the Friends episode about Chandler's superfluous nubbin, she realized, "Wait a second, I've got one of them!" she said. "You have to zoom in, camera," she ordered, as she pulled her left breast out of her dress and showed a small, faint, phantom teet.

Allen isn't the only celebrity to sport the triple nipple, medically known as a "supernumerary nipple." Mark Wahlberg embraces his super nip, which often poses a problem for bare-shirted film scenes, notably the skin-tastic Boogie Nights. Tilda Swinton, who played the White Witch in The Chronicles of Narnia: The Lion, the Witch, and the Wardrobe, said she was "proud" of her witch's mark and used it to threaten her brothers.

Other celebrities aren't as enlightened. In her audition tape for American Idol, singer Carrie Underwood admitted she had her third high-beam removed out of embarrassment—Simon would have spotted and ridiculed it right away.