First of all Trey Songz will never be the next R. Kelly. R. Kelly Write and produce most of his own songs as well as other artis in the music industry ( Whitney, Micheal Jackson, Britney etc..). Most of R. Kelly hits it not songs based on sex ( e.g. I Believe I Can Fly, Gotham City, If I Could Turn Back the Hands of Time, The World's Greatest).