Now this is the craziest thing I have heard for a long time. Listening to the radio (in Dutch) I heard about this Capuchin monk, brother Cesare Bonizzi, who is a grey haired, bearded 62 year old frontman for a heavy metal band. Infected by Metallica, he started up the band which has now produced two albums. Sex, drugs and rock 'n' roll!!
(Well, not sex obviously because he's still a monk)