“Part-Time Lover” was released as the lead single from Stevie Wonder’s 1985 album In Square Circle. It tells a story of undercover lovers, who hide their infidelity from their partners, only to find out in the end that their partners have been cheating on them as well.

The song reached #1 on the Billboard Hot 100, R&B, Dance and Contemporary Adult charts in late 1985. The song’s simultaneous chart success made him the first artist to score a number-one hit on four different Billboard charts. The song also reached number three on the UK singles chart and received a Grammy Award nomination for Best Male Pop Vocal Performance in 1986.