In the 1950s and 60s, the groups were mostly self-organised, girls who knew each other and often grew up together. The Chantels, for example, were four girl choristers from a Catholic high school in the Bronx, 1957. The Ronettes were two sisters and a cousin. The Supremes were girls from a public housing estate in Detroit, Michigan. They were, and still are, America's most successful vocal group of all time. These groups had managers, of course, because they needed someone to deal with the music industry. But the managers did not set up the groups; they came after the groups were formed.