"You Light Up My Life" by Debby Boone (1977)
Debby Boone, daughter of 1950s icon Pat Boone, spent ten weeks on top of the charts with "You Light Up My Life." Who was she singing about? No mere mortal, it was God, according to Miss Boone. She may be a one-hit wonder on the pop charts, but Debby Boone has enjoyed a successful career as a stage actress and in the music biz with hits in both the country and Christian-music genres.