The Supremes and Four Tops were two distinctive American vocal groups from the Motown record label, known for their influence on 1960s and 1970s pop and R&B music. The Supremes, led by Diana Ross, are celebrated for their polished performances and smooth vocals, while the Four Tops, featuring lead vocalist Levi Stubbs, are known for their powerful, emotive sound. Their collaboration resulted in a series of hits like "River Deep - Mountain High," showcasing a blend of both groups' unique styles. Both groups have left an indelible mark on the music industry with their distinctive sound and broad appeal.