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
Mia Birdsong have her first experience of reading books to represent a world that is filled with people of color. Birdsong wanted her daughter to grow up being comfortable in her own skin and to see herself in this world. The positive impact books written by people of color had on Birdsong's daughter was inspirational. Her daughter was able to see herself in the world in a way that Birdsong did not at her age. Birdsong made it one of her life missions to bring this awareness to families and their communities so every child can see themselves for who they are