Conversation so far:
What is the Romanza by Andrea Bocelli?
Romanza is the first compilation album by Italian singer Andrea Bocelli, released internationally in 1997.
did Andrea Bocelli perform in any concerts?
On 28 December, he debuted in the classical world in a concert at the Teatro Romolo Valli in Reggio Emilia.
did people like Andrea Bocelli's performances?
Celine Dion said while introducing him during her Christmas Special, in 1998, that if God would have a singing voice, he must sound a lot like Andrea Bocelli,“
Did Andrea Bocelli ever sing with other people?
The Prayer is his duet with Celine Dion for the animated film Quest for Camelot which won the Golden Globe Award for Best Original Song

Question: What did he sing?
Self-contained rewrite: What did Andrea Bocelli sing?