Under My Skin (Avril Lavigne album)

Under My Skin is the second studio album by Canadian singer-songwriter Avril Lavigne. It was released firstly in Europe on May 21, 2004 then it followed the release in the rest of the world on May 25, 2004 by Arista Records and RCA Records. Lavigne wrote most of the album with singer-songwriter Chantal Kreviazuk, who invited her to a Malibu in-house recording studio shared by Kreviazuk and 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). It was also her first album for RCA.

Under My Skin debuted at number one on the Canadian Albums Chart and on the US Billboard 200. It sold three million copies in the United States, ranking the album number 149 on the Billboard 200 decade-end chart. Because of the album's darker, heavier and more aggressive post-grunge sound, it received mixed to positive reviews, with critics now seeing the album as a classic that defined pop-punk music in the early 2000s (despite it not being usually classified as such), and as anticipating the emotional intensity and theatrical aesthetics of emo pop later in the decade. On March 18, 2013, Under My Skin was re-released as a double-disc set paired with her debut studio album, Let Go, and released under Arista Records.

To promote the album, Lavigne went on a promotional tour for malls in the United States and Canada. Furthermore, Lavigne embarked on a concert tour, entitled the Bonez Tour, starting on September 26, 2004, and ending one year later on September 26, 2005. The concert at the Budokan arena in Japan was filmed and released on a DVD only available in Japan, entitled Bonez Tour 2005: Live at Budokan. Under My Skin has sold over 10 million copies worldwide and is the fifth best selling album of the 21st century by a Canadian artist.