The two most notable alternate versions are a remix by Timbaland , which features different vocals and a guest appearance from Static of Playa ; and the `` Nitro Remix '' ( featuring Nitro and Chief , with production by Mista Maze ) , which uses the original vocals over a bass music-styled backing track . The two most notable alternate versions are a remix by Timbaland , which features different vocals ( Kelly on first verse and lead vocals on chorus ) , lyrics and a guest appearance from Static Major ; and the `` Nitro Remix '' ( featuring Nitro and Chief , with production by Mista Maze ) , which uses the original vocals over a bass music-styled backing track .