Occupation: Singer, Actress

Remember the cute little girl who played Cindy Lou Who in How the Grinch Stole Christmas? This is her. She now fronts the alt-rock band The Pretty Reckless. On stage, porn star Jenna Haze nuzzled up into Momsen's crotch while she performed. And most recently, Momsen and Haze appeared in FHM topless together. What the former Gossip Girl star will do next is anyone's guess.