William "Billy Boy" Arnold is an American blues harmonica player, singer and songwriter. Arnold is a self-taught harmonica player and has worked with blues legends such as Bo Diddley, Johnny Shines, Otis Rush, Earl Hooker, Howlin' Wolf, Muddy Waters and others.

Ellas Otha Bates, known professionally as Bo Diddley, was an American guitarist and singer who played a key role in the transition from the blues to rock and roll. He influenced many artists, including Buddy Holly, Elvis Presley, the Beatles, the Rolling Stones, the Animals, George Thorogood, Syd Barrett, and the Clash.