 Harry Warren wrote the music, Matt Gordon the lyrics on You'll Never Know. That was Alice Faye who sang it in Hello Frisco, Hello. A 1943 Academy Award winner for Best Original Song, Defeating That Old Black Magic, Happiness is a Thing Called Joe, Change of Heart, My Shining Hour, Saludos Amigos, Say a Prayer for the Boys Over There, They're Either Too Young or Too Old, We Mustn't Say Goodbye, and You'd Be So Nice to Come Home To.