The term PRESLEY OR COSTELLO is a reference to two famous entertainers, Elvis Presley and Bud Costello. Elvis Presley was an American singer, musician, and actor who rose to fame in the mid-1950s and is widely regarded as one of the most influential musicians of the 20th century. Bud Costello was an American comedian, actor, and singer who was best known for his work with the comedy duo Abbott and Costello.