Teenagers, rock 'n roll and post war liberation -- The Shirelles and the beginning of the girl group era -- Phil Spector girl groups : the Crystals and the Ronettes -- Motown girl groups : the Marvelettes, the Supremes, and the Vandellas -- The Shangri-las and the end of the girl group era -- Girl groups, girl bands, and 60s pop -- The girl groups' legacy : the 70s -- The girl groups' legacy : the 80s -- Material girls Madonna -- Modern girls : the Spice girls to Lady Ga Ga.