Released on the 2004 album Under My Skin, "Forgotten" stands as a defining track in Avril Lavigne's evolution from pop-punk to mature pop-rock. The song features a driving rhythm and introspective lyrics that explore themes of moving on from a past relationship, marking a significant shift in her musical direction. Produced by the band The Script, the recording blends electronic elements with organic instrumentation, creating a sound that resonated with a new generation of listeners while maintaining the emotional core of her earlier work. As a staple of her discography, the track exemplifies the polished production style that characterized her mid-career period and remains a recognizable part of her catalog.