Dion and the Belmonts was a leading American vocal group of the late 1950s. The group formed when Dion DiMucci, lead singer, (born July 18, 1939), joined The Belmonts - Carlo Mastrangelo, baritone, (born October 5, 1938), Freddie Milano, second tenor, (born August 22, 1939), and Angelo D'Aleo, first tenor, (born February 3, 1940) in late 1957.