Roots of The Blues Brothers

Slim Harpo was an 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" (1957), "Rainin' in My Heart" (1961), and "Baby Scratch My Back" (1966), which reached number one on Billboard's R&B chart and number 16 on its broader Hot 100 singles chart.

Otis Spann was an American blues musician many consider the leading postwar Chicago blues pianist.