Underworld

Amy Lee is credited to have worked on the movie’s soundtrack (her name even appears on the credits). However, her voice was not used in the soundtrack. According to a KNAC article, there were 4 songs that Amy worked on. The titles of three of them are "Now I Know," "Down in the Lab," "Death Dealer's Descent." She may have also worked on "Falling Through the Sky." All of those tracks made the album without her vocals. Amy stated in an old interview (MuchMusic 2003) that her vocals weren't used because of "legal stuff."