Lead singer of the punk rock band Billy Talent, the group that released hits like "Devil in a Midnight Mass."
He was a drummer for the band To Each His Own.
His band was called Pezz originally but after being threatened by a lawsuit, he renamed it Billy Talent.
He married his girlfriend of six years, Rachelle Turner, in August 2011.
Kowalewicz and Billy Talent opened for Gerard Way's band My Chemical Romance in 2008.