Charles Sheffield was a renowned American blues and R&B singer from the mid-20th century. His musical style was characterized by a strong, raw vocal delivery, underpinned by a classic rhythm and blues backing band. Sheffield is best known for his 1961 single "It's Your Voodoo Working," which has since become a classic in the blues genre. Despite his relatively short career, his unique vocal style and gripping songwriting have left a significant mark on the blues and R&B music scene.