This song was a huge hit single for the American R&B/Soul. It peaked at no. 1 on Billboard’s Hot R&B/Soul singles chart and no. 7 on the Billboard Hot 100 in 1968.
This song became one of the longest running number one R&B hits of 1968 and the most successful duet recording of Marvin Gaye's career. It reached no. 19 on the British singles charts in late 1968, staying there for nineteen weeks.