. . "Their songs also have been covered by a myriad of artists including Elvis Presley, the Rolling Stones, Bette Midler, Simply Red, Michael Buble, Johnny Mathis, Lesley Gore, Donny & Marie, Thelma Houston, the Brand New Heavies and most recently, Rod Stewart, who sings four Gamble & Huff classics on his current album, Soulbook." . . . .