From the Grandmother of Rock n Roll Sister Rosetta Tharpe we have possibly the first ever Rock n Roll Track ever created.
Sister Rosetta Tharpe was an American singer, songwriter, guitarist, and recording artist. She attained popularity in the 1930s and 1940s with her gospel recordings, characterized by a unique mixture of spiritual lyrics and electric guitar that was extremely important to the origins of rock and roll. Wikipedia
Here is a great documentary all about her.
Peace Graham