Conversation so far:
How did Dion DiMucci end up in the Belmonts?
Bob and Gene Schwartz signed Dion's friends, the Belmonts, and teamed them, with Dion singing lead.
Who else was signed to the Belmonts, besides Dion DiMucci?
The original Belmonts consisted of Angelo D'Aleo, Carlo Mastrangelo, and Fred Milano.
Did the Belmonts release an album?
In late 1966 the three original Belmonts reunited with DiMucci and recorded the album Dion & The Belmonts Together Again.

Question: What was their initial hit?
Self-contained rewrite: What was the Belmonts' initial hit?