Arthur "Big Boy" Crudup (also known as "Pop" Crudup) (August 24, 1905 – March 28, 1976) was a delta blues singer and guitarist. He is best known outside blues circles for writing songs later covered by Elvis Presley (and since covered by dozens of other artists), such as "That's All Right Mama", "My Baby Left Me" and "So glad you're mine", and by many claims, "Blue Suede Shoes". Born in Forest, Mississippi and living and working in throughout the South and Midwest as a migrant worker for a time