Barry Manilow agreed to sing the romantic theme song to the comedy thriller Foul Play, which starred Chevy Chase and Goldie Hawn. The film was a huge hit, and so was the song, in which a man who has been a recluse for part of his life is ready to take a chance at love again. Manilow's "Copacabana (At The Copa)" was also used in the movie. (thanks, Mike - Santa Barbara, CA)
Edward Norton sings this in the 2000 movie Keeping The Faith, where he plays a priest alongside Ben Stiller, who plays a rabbi.