By Brandy McDonnellAn abbreviated version of this story appears in Saturday's The Oklahoman.Grammy Awards to feature Oklahomans, celebrities and controversiesOklahoma country music standout Blake Shelton and his pop icon girlfriend Gwen Stefani will be among the stars shining at Sunday's Grammy Awards.Shelton and Stefani, who are friendly rivals as coaches on the hit NBC show "The Voice," will perform their new duet, "Nobody But You," on the 62nd Annual Grammys, airing live from the Staples Center in Los Angeles at 7 p.m.Read more on NewsOK.com