"My Happy Ending" is a song by Canadian singer-songwriter Avril Lavigne, written by herself and Butch Walker for her second studio album, Under My Skin (2004). Structurally, the song is written in 4/4 style and has a repeated hook in both the chorus and in the intro and outro.

Avril Ramona Lavigne is a Canadian singer-songwriter. She is considered a key musician in the development of pop-punk music, as she paved the way for female-driven, punk-influenced pop music in the early 2000s. Her accolades include eight Grammy Award nominations, among others.