"Complicated" is a song by Canadian singer-songwriter Avril Lavigne from her debut album, Let Go (2002). The ballad was released as her debut single and the lead single from the album on 11 March 2002 by Arista Records. Lavigne and production team the Matrix (Lauren Christy, Scott Spock, and Graham Edwards) are credited as writers. Production on the song was helmed by the Matrix. According to Lavigne, the song is about being honest with oneself rather than "putting on a face".