Watch Batgirl V Supergirl for Free: How to Stream the Movie Online at 123Movies. . Earth's sexiest Super XXX Hero is a young co-ed from another planet. Supergirl barely escapes the destruction of her home planet, but her greatest challenge lies ahead - sorority life! With the help of her cousin, Superman and her bff, Barbara Gordon, Supergirl tries to pass off as human. The only thing standing in her way from a a life of text books, keg parties and casual sex, is Natasha Luthor, the Queen Bitch of the Tri-Pi Sorority. In Luthor's plan for world domination, Supergirl is the last piece of the puzzle.