The Bar-Kays
The Bar-Kays are a soul, R&B, and funk group formed in 1966. The group had dozens of charting singles from the 1960s to the 1980s, including "Soul Finger" (U.S. Billboard Hot 100 number 17, R&B number 3) in 1967, "Son of Shaft" (R&B number 10) in 1972, and "Boogie Body Land" (R&B number 7) in 1980.
source: Wikipedia