"Seven" is a song written by David Bowie and Reeves Gabrels for the album Hours in 1999. As with some of the other songs from Hours it was originally written for the computer game Omikron - The Nomad Soul from 1999. In July 2000, it was released as the fourth single from the album. The version used in the Omikron - The Nomad Soul was called "Demo version" on the single releases.
Bowie performed the song live at the BBC Radio Theatre in London, 27 June 2000, and a recording of this performance was included on the bonus disc that accompanied the initial release of Bowie at the Beeb in 2000.
The "Demo version", "Marius De Vries mix", and two different Beck remixes were released on the bonus disc that followed the 2004 reissue of Hours; the former was re-released as part of the Nothing Has Changed compilation.