Billy & Lillie were an American pop vocal duo consisting of Billy Ford and Lillie Bryant, active during the late 1950s to early 1960s. Their music was characterized by its upbeat, catchy melodies and strong vocal harmonies, which were typical of the pop genre during that era. The duo gained significant recognition for their hit single "La Dee Dah", which peaked at number nine on the Billboard Top 100 chart in 1958. Despite their short-lived career, Billy & Lillie made a notable contribution to the pop music of the late '50s and early '60s.