App makers must be salivating in hopes that Swizz Beatz inadvertently shares his contacts list by failing to read the terms-of-service fine print. The New York rapper-producer (real name: Kasseem Dean) enlists an impressive pair of rising stars, DJ-producer AraabMuzik and rapper A$AP Rocky, on "Street Knock," from his forthcoming Limitless mixtape. The flashy video goes one further, however, delivering cameos from basketball great Allen Iverson and a host of hip-hop veterans, plus the requisite expensive car. As the video's inclusion of a drum line confirms, AraabMuzik's twitchily propulsive style here isn't so unlike that of the One Man Band Man himself, while Swizz and Rocky trade ridiculous boasts with charisma to spare. It might be hard to pay attention to their lyrics while you're playing spot-the-rapper, though.