"Sk8er Boi" is a song by Canadian singer-songwriter Avril Lavigne, released as the second single from her debut album, Let Go (2002). It was written by Lavigne and the Matrix, and produced by the Matrix. The song, which combines power pop and pop-punk elements, lyrically tells a story told from the singer's viewpoint about her rocker boyfriend and a girl he knew in high school who rejected him because he was a skateboarder and she did ballet.

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.