7. Erika Christensen, Swimfan (2002)
Madison (Christensen) has her eyes set on the high school water polo hunk, Ben (Jesse Bradford), who is having trouble with his girlfriend. She invites him out to dinner, has sex with him in a swimming pool, and that's when she goes off the deep end. Like all good crazy chicks, Madison becomes completely infatuated. She sends Ben naked pictures of herself, shows up at his work and swim practice, and tries to kill his girlfriend by drowning her. The film only made $28 million at the box office, but it had cult appeal, especially among teenagers. "Men have liked that character a lot, even though she's out of her mind," Christensen says. "People like to be scared I guess, especially by a girl."