"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).

Lavigne wanted "My Happy Ending" to be released as the album's lead single, but the label went with ''Don't Tell Me'' instead.

David Browne of Entertainment Weekly magazine commented "Lavigne herself sounds more burdened; ... the sk8erboi of the first album has turned out to be a selfish, nasty creep who ... treats her like crap".

[7] PopMatters thought "The second single, "My Happy Ending", suffers from a marked similarity to a few recent hits, notably Michelle Branch's "Everywhere" and Vanessa Carlton's "A Thousand Miles" (...) The ticklish good humor of "Sk8er Boi" has been subsumed by the sardonic regret of "My Happy Ending".

[11] "My Happy Ending" peaked at number nine on the US Billboard Hot 100, spending a total of 25 weeks on the chart.

[24] The music video for "My Happy Ending" was written and directed by MTV and Grammy winner Meiert Avis.

At first, the memories (shown in full color) are happy, depicting Lavigne at the park with her boyfriend, as he hands her a flower and they laugh together.

The relationship culminates during the song's bridge inside a grocery store, where her boyfriend antagonizes her, insisting that he talk to her.

"My Happy Ending" was first performed as part of Lavigne's Live by Surprise Tour, a group of 21 impromptu concerts in shopping malls that ran between March 5, 2004 and April 15, 2004.

[33] On August 26, 2005, Lavigne performed the song in Bryant Park as part of Good Morning America's televised "Summer Concert" series.