Age: 18
It’s funny that Momsen was once in the running to portray Hannah Montana (before losing the role to Miley Cyrus), given that the frontwoman of the punk band The Pretty Reckless had a reputation being a mini Courtney Love before she even turned 18. The singer, whose band opened for Evanescence last fall, was recently the subject of a risqué FHM photoshoot, in which she posed with a half-naked adult film star, Jenna Haze, who also appeared in her sex-fueled video for “My Medicine.”