Doris Duke was an American soul singer, active throughout the 1960s and 1970s. She is best known for her deep, emotive vocal style that was rooted in gospel and R&B, which significantly contributed to the Southern Soul genre. Duke's most influential work is arguably her 1969 album, "I'm a Loser," produced by Swamp Dogg at the famed Muscle Shoals studio. Despite her limited commercial success, Duke’s poignant vocal delivery and emotionally charged lyrics have earned her a revered place in the annals of soul music.