C21 was a Danish boy band consisting of three key members: Søren Bregendal (vocals, lyricist, producer and keyboards), Esben Duus (vocals, lyricist and guitar), and David Pepke (vocals, lyricist, guitar).
The band was formed in 1998 when Danish music producer Lars Quang heard Søren Bregendal singing in the locker room after his son's soccer game. Quang invited Søren Brengedal to his studio to test his vocals. Søren brought his fellow school friend, Esben Duus to the studio. At a warm up gig at a birthday party, the two met fellow musician David Pepke and the trio was formed.
