I Sing for You Alone

Tre uomini in frak

Also known as Trois hommes en habit, L'amore che canta, Tre uomini in frack

Marcello, a shy tenor, is afraid of singing in public. Two friends of his think of having an elegant youth on the stage pretending to be singing while Marcello dubs him behind the scenes. The scam is successful but after a while Marcello summons the courage to go on stage himself.