Conversation so far:
Who were the other members of the Belmonts?
The other members of the Belmonts were Carlo Mastrangelo, Fred Milano, and Angelo D'Aleo
Did the members of the Belmonts know each other from school?
The other members of the Belmonts were from the same neighborhood as Dion DiMucci
How old were the members of the group the Belmonts?
They were adolescents
What was the Belmont's most popular song?
The group's biggest hit, Where or When, reached No. 3 on the U.S. charts
When did the group the Belmonts split up?
They split up in October 1960
Was the group the Belmonts liked worldwide?
They only charted in the U.S.

Question: what is the most interesting thing about the group?
Self-contained rewrite: what is the most interesting thing about the group the Belmonts?