Sandy and Dick St. John, also known as "Dick and Dee Dee," were an American musical duo prominent in the 1960s. Their style was a blend of pop, rock, and doo-wop, and they're best known for their harmonic vocal arrangements. The duo produced several hits, most notably "The Mountain's High," which reached number two on the Billboard Hot 100 chart in 1961. Despite their short-lived career, they left a lasting imprint on the music industry, particularly within the pop genre.