"Upside Down" is a song written and performed by Jack Johnson, and used for the 2006 animated film Curious George. It is the first track and first single from the soundtrack album Sing-A-Longs and Lullabies for the Film Curious George, which was released in February 2006 (same month as theaters). A remix edition featuring Money Mark was released as a bonus track on some versions of Sing-A-Longs and Lullabies for the Film Curious George. "Upside Down" was a top-40 hit in Austria, the Netherlands, New Zealand, the United Kingdom and the United States.