Related Information for John Mogensen John Mogensen ( May 5, 1928 - April 10, 1977 ) was a Danish singer, song writer and pianist.He was a member of the song quartet Four Jacks (1956-1963) and already then getting popularity as a song writer but after some years he had a remarkable come back as a solo singer from 1971. With his rough voice and frank and direct language he formed a rare link between traditional pop and the folk song, alternating between direct criticism of society simple love songs and reflections from the pub.. read more