Marc Costanzo is the co-lead singer of the Canadian pop band Len. His sister Sharon, better known as "Shar", also sings with him. Even though he is still with the band, in the making of a new album, he is a producer at EMI Music Canada. Marc has spent much of 2007 in London with his sister working on various projects with his former manager Graeme Lowe. For a while, he was a guitarist for the highly prolific pop/punk Canadian band Sum 41 when they didn't have a guitarist back in 1998. His affiliation with SUM 41 ended just before the release of Len's major label debut, You Can't Stop the Bum Rush. Marc has an ethnic background of half British, quarter French and quarter Italian.
