19. Cyborg 2 - Angelina Jolie
Long before Jolie fancied herself as an auteur, she was starring in straight-to-DVD sequels to Jean Claude Van Damme movies that saw the martial artist replaced by Elias Koteas.
By her own admission, after Jolie saw the film, she went home and vomited and it's hard to blame her. The fact that she managed to keep it together that long is actually pretty impressive.