Slim Harpo

American blues musician, a leading exponent of the swamp blues style, and "one of the most commercially successful blues artists of his day". He played guitar and was a master of the blues harmonica, known in blues circles as a "harp". His most successful and influential recordings included "I'm a King Bee", "Rainin' in My Heart", and "Baby Scratch My Back", which reached number one on Billboard's R&B chart and number 16 on its broader Hot 100 singles chart.