The Four Hi's were a short-lived R&B vocal group from the mid-1960s. They were known for their harmonious, soulful sound which was rooted in the doo-wop style of the 1950s, but incorporated elements of the emerging soul genre. Although they did not achieve significant commercial success, their music has been recognized for its quality and originality. Among their most notable songs is "Heartbreak River," which showcases their tight harmonies and emotive vocals.