Related Information for Dion & The Belmonts Dion & the Belmonts were a leading American vocal group of the late 1950s. The group formed when Dion DiMucci joined The Belmonts - Carlo Mastrangelo, Fred Milano (August 22, 1939 - January 1, 2012), and Angelo D'Aleo - in late 1957.After an unsuccessful first single, the group were signed to Laurie Records. Their breakthrough came when "I Wonder Why" made # 22 on the Billboard Hot 100 chart, and the group appeared for the first time on the Dick Clark TV show. They followed it.. read more