Career
In 1997, he started at age 18 when he released his demo as a download album entitled Manuskript uden titel. Hetehn formed the Danish popular/rock band Coolsville in which he was songwriter and lead vocalist. The band released in May 2005 their album Langt fra landet with resulting singles "Det gælder", "Brændt af" and "Tog til møde ved en fejl".
After the breakup of the band, Jonas Breum launched a musical career with his debut studio album Fremtiden findes hos hende jeg forlod.
