"Fly" is a song recorded by American singer Hilary Duff for her self-titled third studio album (2004). The song was written by Kara DioGuardi and John Shanks, who also produced the song. It was released in the United States on August 10, 2004 by Hollywood Records, as the lead single of Hilary Duff. The single was released by Angel Records on March 13, 2006 in Europe as the fourth and final single from Duff's first compilation album, Most Wanted (2005).