Metamorphosis is the second studio album by American singer-songwriter Hilary Duff. The album was released on August 26, 2003, by Buena Vista Records and Hollywood Records as the follow-up to her Christmas 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 Kara DioGuardi.