Question of the week

Elvis released his first single on this date in 1954, "That's Alright Mama." What legendary bluesman did he steal the song from? By the way, the photo above is of Black Elvis, who is the most famous person to come from my town of Nassawadox, VA (He was on the Arsenio Hall Show!). Strangely, the answer to this week's question also lived in Nassawadox for a while.