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,
Florence Ballard three girls." All in all, Ballard contributed vocals to ten number-one pop hits and 16 top forty hit singles between 1963 and 1967. Ballard expressed dissatisfaction with the group's direction throughout its successful period. She would also claim that their schedule had forced the group members to drift apart. Ballard blamed Motown Records for destroying the group dynamic by making Diana Ross the star. Struggling to cope with label demands and her own bout with depression, Ballard turned to alcohol for comfort, leading to arguments with her group members. Ballard's alcoholism led to her missing performances and recording sessions. Gordy