"Sister Smile" is the stage name of Jeanne-Paule Marie, a Belgian singer and nun known for her hit song "Dominique." Born in 1933, she gained fame in the 1960s with her unique blend of religious themes and pop music, appealing to a wide audience. Her music often featured uplifting melodies and lyrics that reflected her faith. Despite her success, she eventually left the music industry to focus on her religious life, becoming a symbol of the intersection between spirituality and popular culture during her time.