 Following his success, Penniman built up his backup band, The Upsetters, with the addition of saxophonists Clifford "Gene" Burks and leader Grady Gaines, bassist Olsie "Baysee" Robinson and guitarist Nathaniel "Buster" Douglas.Penniman began performing on package tours across the United States.Art Rupe described the differences between Penniman and a similar hitmaker of the early rock and roll period by stating that, while "the similarities between Little Richard and Fats Domino for recording purposes were close", Penniman would sometimes stand up at the piano while he was recording and that onstage, where Domino was "plodding, very slow", Penniman was "very dynamic, completely uninhibited, unpredictable, wild.