"I'm So Sick" is a song by American rock band Flyleaf.

[4] It is their second song to have an accompanying music video and it has been shown on many mainstream television networks.

On March 3, 2008, "I'm So Sick" was released in the UK and was played on Scuzz, Kerrang!

The song was partly inspired by a quote from Saint Augustine's autobiography Confessions.

Flyleaf vocalist Lacey Mosley once commented that she was surprised at how much her voice "downshifted" during the introductions.