7 is the seventh studio album by French DJ and record producer David Guetta, released on 14 September 2018 by What a Music, Parlophone and Big Beat Records. Released as a double album, the collection features commercial pop collaborations on the first disc, whilst disc two features underground house music akin to Guetta's starting roots as a DJ. The latter is credited to Jack Back, which Guetta revealed to be his alias and as a means to release more dance music alongside his pop collaborations. This side of the album is known as the Jack Back Project and was also released independently as a mixtape titled the Jack Back Mixtape, preceded by the release of the song "Overtone". 7 was made available to pre-order on 23 August 2018 via Guetta's official website with options to pre-save the album