The "Singing Nun" refers to Sister Luc Gabriel, a Belgian nun who gained fame in the 1960s for her musical talent. She became widely known for her hit song "Dominique," which celebrated the life of Saint Dominic. The song topped charts in several countries and showcased her unique blend of religious themes and popular music. Sister Luc Gabriel was born in 1933 and joined the Sisters of Notre Dame order. Her music career was brief, as she returned to her religious life after achieving success. Despite her short time in the spotlight, her contributions to music and faith continue to be remembered.