. "Their songs also have been covered by a myriad of artists including Elvis Presley, the Rolling Stones, Bette Midler, Michael Buble, Martina McBride, Seal, Simply Red, Johnny Mathis, Lesley Gore, Donny & Marie, Thelma Houston, the Brand New Heavies and recently, Rod Stewart, who sings four Gamble & Huff classics on his 2009 album, Soulbook." . . . . . . . .