"My Happy Ending" is a song written and produced by Avril Lavigne and Butch Walker for Lavigne's second album, Under My Skin (2004). It was released as the album's second internationally released single in 2004 (see 2004 in music) and became Lavigne's third most successful single in the United States and Australia, reaching the top ten in both countries. In those countries, it peaked higher than "Don't Tell Me", the album's first single. In the United Kingdom, it reached the top five, and in the United States, it peaked at number nine. The RIAA certified "My Happy Ending" platinum in January 2005, making it Lavigne's second platinum single after "Complicated" (2002). The song contains the word shit, which generated a small amount of controversy. This song was once very popular on Radio Disney, and because Disney is targeted toward children, the word shit was replaced by stuff in the radio edit of the song.
