Metamorphosis is the second studio album by American singer Hilary Duff. Marketed as her debut album, it was released on August 26, 2003 by Buena Vista and Hollywood Records as a follow up to her holiday album, Santa Claus Lane (2002). According to Duff, the album incorporates elements of pop and rock music, and it represents changes that are specific to her life and that everyone experiences. Duff worked with several producers on the album such as The Matrix. Others who collaborated on the album include Chico Bennett, Matthew Gerrard, John Shanks, and his frequent writing partner Kara DioGuardi.