Cindy Birdsong did not hear Birdsong's voice on most of The Supremes' newest singles. Except for featured backgrounds on several collaborations with The Temptations, live album tracks, and some studio LP tracks, Birdsong and fellow member Mary Wilson did not sing backing vocals on the group's later singles. Session singers The Andantes substituted for Mary and Cindy on many, although not on all, cuts in subsequent Diana Ross & the Supremes albums. Both the "Let the Sunshine In" album and the "Cream of the Crop" album include tracks on which Florence Ballard, Mary Wilson and Cindy Birdsong sing back-up, often in tandem
Nona Hendryx where she met fellow New Jersey native Sarah Dash and later met Philadelphia-born singer Patricia Holte (Patti LaBelle). After a short-lived tenure as a member of the Del-Capris, Hendryx and Dash formed a singing group with Holte (once the lead singer of a girl group in Philadelphia called The Ordettes). In 1961, Cindy Birdsong, from Camden, New Jersey, became the fourth member of the group, who became the 'Bluebelles' and signed their first deal with Newtown Records. After the release of their debut hit, 1962's "I Sold My Heart to the Junkman", their name altered again to Patti LaBelle and