Diana Ross had many hits in her career.
Diana Ross . Following her departure from The Supremes in 1970 , Ross released her eponymous debut solo album that same year , which contained the Top 20 Pop hit `` Reach Out and Touch ( Somebody 's Hand ) '' and the number-one Pop hit `` Ai n't No Mountain High Enough '' . She later released the album Touch Me in the Morning in 1973 ; its title track reached number 1 , as her second solo hit . By 1975 , the Mahogany soundtrack included her third number-one hit , `` Theme from Mahogany ( Do You Know Where You 're Going To ) '' . 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 . In 1993 , the Guinness Book of World Records declared Ross the most successful female music artist in history , due to her success in the United States and United Kingdom for having more hits than any female artist in the charts , with a career total of 70 hit singles with her work with the Supremes and as a solo artist .