; personnel james scheffer -- songwriter ester dean -- songwriter frank romano -- songwriter , guitar and bass daniel morris -- songwriter and additional keyboards jim jonsin -- producer , programming and keyboards harvey mason , jr. -- vocal producer andrew hey -- vocal recording david boyd -- vocal recording assistant michael daley -- vocal recording assistant dabling harward -- additional vocal recording robert marks -- recording and audio mixing ghazi hourani -- recording assistant justin merrill -- mixing assistant matt huber -- mixing assistant chris gehringer -- mastering credits adapted from killer love booklet liner notes .