You could hear their harmonies LIVE. There was no continuous screaming from teeny-boppers like the beatle bands would get when I saw The Marvelettes[[Gladys,Kat & Wanda)Martha & the Vandellas [[Martha, Roz & Lois) Supremes[[Diana, Mary & Cindy) in the 60's. There were no Andantes behind the curtain either. The producers were driven by business decisions & timelines.In the case of the Crystals & the Ronettes, Phil Spector was the STAR, but I saw them LIVE & they were GREAT.