The Supremes were a hugely successful Motown all-female singing group active from 1959 until 1977, performing at various times doo-wop, pop, soul, Broadway showtunes, psychedelia, and disco. Second only to The Beatles in terms of records sales and chart success, The Supremes were the most successful American musical act of the 1960s, delivering twelve #1 hits between 1964 and 1969, many of them written and produced by Motown's main songwriting and production team, Holland-Dozier-Holland.