The term 'Supremes Leader' refers to Diana Ross, an American singer, actress, and record producer. She was the lead singer of the Motown girl group The Supremes from 1959 to 1970. During her time with the group, they released twelve number-one singles on the US Billboard Hot 100, including 'Where Did Our Love Go', 'Baby Love', and 'Stop! In the Name of Love'. After leaving the group in 1970, Ross went on to have a successful solo career, releasing hits such as 'Ain't No Mountain High Enough' and 'I'm Coming Out'.