Worst: "You Light Up My Life" ('You Light Up My Life,' 1977)
And now, the answer to the musical question, Can a song sound beige? Arguably the nadir of Seventies soft rock, "You Light Up My Life" became a smash hit for Debby Boone, daughter of rock and roll whitewasher Pat, topping the charts for a record-setting 10 weeks. Her version has been spun as an inspirational Christian hymn, but the story behind the song is as ugly as it gets. Songwriter Joe Brooks effectively swiped it from its original singer, Kasey Cisyk, allegedly after she spurned his sexual advances, instructing Boone to imitate Cisyk's vocals instead. Brooks himself committed suicide in 2011 while awaiting trial for dozens of rape and sexual assault charges.