Under My Skin is the second studio album by Canadian singer-songwriter Avril Lavigne, released in Europe on May 21, 2004, and the rest of the world on May 25, 2004, by Arista Records. Lavigne wrote most of the album with singer-songwriter Chantal Kreviazuk, who invited her to a Malibu in-house recording studio she shared with her husband Raine Maida, where Lavigne recorded many of the songs. The album was produced by Maida, Don Gilmore, and Butch Walker. It was Lavigne's second and final studio album to be released by Arista, following Let Go (2002).