Christian Korcan (Zurich, Switzerland 2007) better known by his stage name Jack Holiday, is a Swiss DJ, songwriter and music producer and considered a renowned figure in Swiss house music, well known for his collaborations with Swiss DJ Mike Candys and with Christopher S. The three have carved up a partnership in similar fashion to the Swedish House Mafia. Jack Holiday's big success came with "Insomnia" with Mike Candys. It became an international hit not only in France and Switzerland, but also in Denmark, Belgium, Germany and the Netherlands. The remix by Mike Candys and Jack Holiday was in the .