The Supremes were an American girl group and a premier act of Motown Records during the 1960s. Founded as the Primettes in Detroit, Michigan, in 1959, the Supremes were the most commercially successful of Motown's acts and the most successful American vocal band, with 12 number-one singles on the Billboard Hot 100. Most of these hits were written and produced by Motown's main songwriting and production team, Holland–Dozier–Holland. It is said that their breakthrough made it possible for future African American R&B and soul musicians to find mainstream success. Billboard ranked the Supremes as the 16th greatest Hot 100 artist of all time.