Which song gave Debby Boone a 10-week Billboard Hot 100 No. 1 in 1977?

“You Light Up My Life” gave Debby Boone a 10-week Billboard Hot 100 No. 1 in 1977.

The song was written by Joseph Brooks for the film You Light Up My Life. Kasey Cisyk performed the song in the movie, while Boone recorded the commercially released version. Boone’s single became one of the most successful songs of the 1970s, reaching No. 1 on October 15, 1977, and remaining there for 10 weeks.

The distinction between the film vocal and the hit single is an important part of the song’s history. The voice heard in the film was Cisyk’s, but Boone’s version was the recording that became the major Billboard chart success. Boone’s father, Pat Boone, was also a famous singer, although he did not perform this hit.

The song’s long run made it a defining chart record of 1977. It is sometimes confused with later adult-contemporary ballads, but the 10-week Hot 100 leader was specifically Boone’s recording.