During the 40s, 50s and 60s Sister Rosetta Tharpe played a highly significant role in the creation of rock & roll, inspiring musicians like Elvis Presley, Jerry Lee Lewis, Johnny Cash, Little Richard and Chuck Berry. She may not be a household name, but this flamboyant African-American gospel singing superstar, with her spectacular virtuosity on the newly-electrified guitar, was one of the most influential popular musicians of the 20th century.