Carlo Mastrangelo was an American doo-wop and progressive rock singer. Born and raised in The Bronx, he lived in an apartment on the corner of 179th St. and Mapes Ave. He also played drums before and after The Belmonts with several groups.

The Belmonts were an American doo-wop group from the Bronx, New York, that originated in the mid-1950s. The original group consisted of Angelo D'Aleo, Carlo Mastrangelo, and Fred Milano. They took their name from Belmont, the Bronx street in which Mastrangelo lived, known as the Little Italy of the Bronx. From 1958–60 the group performed with Dion DiMucci as Dion and the Belmonts. At this time Mastrangelo sang the bass parts, Milano the second tenor, D'Aleo the falsetto, and DiMucci did lead vocals. Mastrangelo was replaced in 1962 by Frank Lyndon and Warren Gradus, but the original group reunited in 1966, and thereafter performed together in numerous reunions over the years. They occasionally recorded new singles into the 1980s and performed live until the death of Milano in 2011. Gradus continued, performing live under the moniker until his death in October 2023.