Rosalind Ashford helped the group to distinguish themselves from the other girl groups in the label including the pop-oriented Marvelettes and the doo-wop-influenced Supremes with a rougher, brassier gospel-influenced sound. Reeves was a brassy alto while Annette was a deep contralto, and Rosalind was a high soprano. Like the Supremes' Florence Ballard, the Marvelettes' Wanda Rogers and The Four Tops' Abdul "Duke" Fakir, Ashford registered as the high background vocal in Vandellas records. After "Quicksand" gave the group a third top forty pop hit, Beard left to start a family with her new spouse. Reeves recruited a former member of The Velvelettes,
Girl group an environment of entertainment in which the appearance of the girl group was not unfriendly, and musical forms like a cappella and barbershop quartet singing provided inspiration for the structure of the songs and types of harmonies sung by initial girl groups. Importantly, the first successful girl groups of this era were typically white, but capitalized on using music such as ragtime that had originated in the African American community. This era was also advantageous to the beginnings of girl group music because of the newfound prevalence of the radio as well, which allowed this style of music to spread.