 During this time, Penniman advised the group on how to perform his songs and taught Paul McCartney his distinctive vocalizations.Back in the United States, Penniman recorded six rock and roll songs with the Upsetters for Little Star Records, under the name "World Famous Upsetters", hoping this would keep his options open in maintaining his position as a minister.In the fall of 1963, Penniman was called by a concert promoter to rescue a sagging tour featuring The Everly Brothers, Bo Diddley and the Rolling Stones.