Chak was a group by 3 actors of the German TV soap Gute Zeiten Schlechte Zeiten (Good times bad times). Ch.arly, A.ndy and K.im did a eurodance song called Summer Party. The single was produced by Bülo Aris and Toni Cottura. They competed against the group Just Friends (who were also actors in the same TV soap) and lost the competition. This is why there were no second single released.