Producer and rapper Chauncey Hollis, Jr. justifies his ambitious stage name by delivering hits that teamed up some of the biggest stars in popular music, from JAY Z and Kanye West to Lil Wayne and Eminem. And it's Hit-Boy's ornate, gorgeously textured tracks that keep his A-list clientele coming back, with drums that thump and scrape and synths that explode into glittering fireworks.