"Incomplete" is a song by American vocal group Backstreet Boys from their fifth studio album, Never Gone (2005). The power ballad was released on April 11, 2005, as the group's first single since they decided to reunite after a two-year hiatus. It was written by Dan Muckala, Lindy Robbins, and Jess Cates, and it was produced by Muckala with Kevin Richardson on piano. According to Billboard magazine's Chuck Taylor, the song is an "emotion-packed, grown-up tome about relationship struggle and strife."