One Thing is a song by the English-Irish boy band One Direction, from their debut album, Up All Night (2011). Written by Rami Yacoub, Carl Falk, and Savan Kotecha and produced by Yacoub and Falk, the song was inspired by unrequited love. The track received a positive response from music critics, who noted similarities with the works of other bands in the genre. One Direction promoted the song with live performances and it is part of the setlist f ... See more [+] or most of their tours.