T.I. Vs. T.I.P. is all about the battle within T.I. himself, he told Billboard. On a collaboration with Eminem, he advises Marshall Mathers on how to keep Slim Shady in check by explaining how he does it with his alter-ego T.I.P., who runs loose all over the album. It's the first collaboration between the two, and another first-timer, Wyclef Jean, produced three tracks and guests on "You Know What It Is." But virtually everyone else who appears to help T.I. has worked with the Atlanta MC in some capacity. Justin Timberlake, whose track on Vs. hasn't been confirmed yet, returns the favor from T.I.'s spot on "My Love." Jay-Z's voice was sampled on T.I.'s "Bring 'Em Out," but the real one shows up on "Watch What You Say to Me." Busta Rhymes, who's on "Hurt," did "Cannon" with T.I. for the Busta mixtape The Crown. Nelly last showed up on T.I.'s Urban Legend and returns to the new one on "Show It to Me." And old-school producer Mannie Fresh, the man behind several of T.I.'s singles and remixes, handled the first single "Big Things Poppin' (Do It)."