Sisters Dionne Warwick, Dee Dee Warwick and Cissy Huston all started out as The Drinkard Sisters singing in church and doing the gospel thing, as so many soul singers did. The fusion of Blues and folk songs with religious gospel music resulted in R ‘ n B. Probably with a little jazz for good measure! Four US postage stamps featured female gospel singers: Roberta Martin, Sister Rosetta Tharpe, Clara Ward, and Mahalia Jackson, all known for their stirring renditions of songs that touched the heart and soul of listeners across the nation.
Wikipedia: The Drinkard Singers