Nat King Cole’s “Send for Me” (1957) was one of his biggest crossover hits. The single topped the R&B chart and reached #6 on the pop chart:. Producer Lee Gillette described it as 'the closest he ever got to rock & roll' because of its driving beat and distorted guitar sounds:. Cole’s smooth delivery made it a radio favorite, and it has since been considered a classic example of ’50s R&B.