US vocal group, pioneers of the Motown sound, formed 1959 in Detroit. Beginning in 1962, the group was a trio comprising, initially, Diana Ross (1944-), Mary Wilson (1944-), and Florence Ballard (1943-1976). One of the most successful female groups of the 1960s, they had a string of pop hits beginning with `Where Did Our Love Go?' 1964 and `Baby Love' 1964. Diana Ross left to pursue a solo career 1969.