Jimmy Breedlove was a prominent American R&B and rock and roll singer in the mid-20th century. His musical style combined elements of traditional rhythm and blues with the emerging rock and roll sound, demonstrating a high-energy and soulful vocal delivery. One of his most significant contributions to music history is his work as a demo singer for the legendary songwriting team, Leiber and Stoller. Despite Breedlove's relative obscurity, his performances on demos like "Jailhouse Rock" played an instrumental role in shaping Elvis Presley's iconic sound.