Endless Love was released by Diana Ross.
Diana Ross . After leaving Motown , Ross achieved her sixth and final US number-one Pop hit , with the duet `` Endless Love '' , composed for the Brooke Shields film of the same name , by and performed with former Commodores front man , Lionel Richie . Endless Love (1981 film) . The film was a moderate box-office success , and its theme song , performed by Diana Ross and Lionel Richie and also called `` Endless Love '' , became a # 1 hit on the Billboard Hot 100 . `` Endless Love '' is a song written by Lionel Richie and originally recorded as a duet between Richie and fellow soul singer Diana Ross .