You don't have to be a Hollywood superstar to haunt Mr. Skin's dreams. Case in point: Mexican mamacita Grace Avila, who isn't a professional actress but still keeps us lying awake at night. That's probably because she's completely naked in her one feature film role, Carlos Reygadas' 2005 arthouse drama Battle in Heaven, where she goes full frontal posing for the camera in an empty room. Hail hairy, frontal Grace!