Two things I learned about Elvis Presley in the past two years;
1. He was friends with the late Fr. Hector Bolduc and he had intended to do a benefit concert for the Society of Saint Pius X in the United States. Elvis died shortly before the planned concert. Fr. Bolduc had met and befriended Elvis while they were both in the Army. He had helped him with problems he was having with his own father.
(Ref: Fr. Joe Pfeiffer Requiem Sermon for Fr. Bolduc)
2. He composed and recorded a very traditional song about the Miracles of the Rosary and the Blessed Virgin Mary. Featured below.