You Light Up My Life

"You Light Up My Life" is a ballad written by Joseph Brooks, and originally recorded by Kasey Cisyk for the soundtrack album to the 1977 film of the same title. The song was lip synced in the film by its lead actress, Didi Conn. The best-known cover version of the song is a cover by Debby Boone, the daughter of singer Pat Boone. It held the No. 1 position on the Billboard Hot 100 chart for ten consecutive weeks in 1977 and topped Record World magazine's Top 100 Singles Chart for a record 13 weeks. Original film version Cisyk's original soundtrack recording was included in the film's soundtrack album. It was then later released as a single to bolster sales of the soundtrack album after Debby Boone included her version on her first solo album (also titled You Light Up My Life). Although the soundtrack album was certified Gold, peaking at No. 17 on the Billboard 200 albums chart, it never included Boone's hit single version of the song. Cisyk's single was credited to "Original Cast", not to Cisyk herself, and even though Brooks is listed on the A-side of the single, the "Original Cast" B-side charted on the Billboard Hot 100 and only reached No. 80. Brooks also released an instrumental version of the song from the soundtrack as a promotional single, but that version failed to chart.