The Beatles did a cover of this one on their "Beatles For Sale" album. This is the original by Dr. Feelgood & The Interns. Dr. Feelgood is actually Piano Red (Willie Lee Perryman). He started using "Dr. Feelgood" as a persona he developed for himself as a DJ in Atlanta. A young James Brown actually appeared on the "Dr. Feelgood Show" in the 50's.