Debby Boone is a singer and actress who is best known for her 1977 hit single 'You Light Up My Life'. She is the daughter of singer PAT Boone, who was a major star in the 1950s and 1960s. Debby Boone has released several albums and singles over the years, and has also appeared in films and television shows. PAT Boone is an American singer, actor, and writer who had a string of hit singles in the 1950s and 1960s. He is also the father of Debby Boone.