The recording features guest vocals by Merry Clayton, recorded at a last-minute late-night recording session during the mixing phase, arranged by her friend and record producer Jack Nitzsche. After the first verse is sung by Jagger, Merry Clayton enters and they share the next three verses. A harmonica solo by Jagger and guitar solo by Richards follow. Then, with great energy, Clayton repeatedly sings “Rape, murder! It’s just a shot away! It’s just a shot away!”, almost screaming the final stanza. She and Jagger then repeat the line “It’s just a shot away” and finish with repeats of “It’s just a kiss away”. When speaking of her inclusion in the recording, Jagger stated in the 2003 book According to the Rolling Stones: “The use of the female voice was the producer’s idea. It would be one of those moments along the lines of ‘I hear a girl on this track – get one on the phone. ‘” Summoned – pregnant – from bed around midnight by producer Jack Nitzsche, Clayton made her recording with just a few takes then returned home to bed. It remains the most prominent contribution to a Rolling Stones track by a female vocalist.