"I'm with You" is a song by Canadian singer-songwriter Avril Lavigne from her debut studio album Let Go (2002). It was released to radio as the third single from the album on November 18, 2002, by Arista Records. The song was written by Lavigne and the production team the Matrix, which consists of Lauren Christy, Scott Spock, and Graham Edwards. Production on the song was helmed solely by the Matrix. According to Lavigne, the song was inspired by feelings of loneliness she experienced over being single.