Lil Pump—one of a handful of insurgent Florida kids who’ve rocketed up the charts—is a divisive avatar for the direction rap might be heading. The 17-year-old’s fast rise owes not just to his music (supremely turnt-up and radically repetitious trap-rap), but also his social media presence, particularly on Instagram, where he has more than six million followers. The propulsive and mesmerizing “Gucci Gang” peaked at No. 3, and it’s the shortest song to enter the top 10 since 1975. Pump clearly has some growing up to do—his Instagram, for example, is full of miscreant fuckery, including reckless glorification of Xanax and lean abuse. But the clamor of his young fan base—and cosigns from by Southern rap veterans more than twice his age, including Gucci Mane, 2 Chainz, and Rick Ross, who all cameo on Pump’s self-titled October mixtape—indicate he’s here to stay. With Devon Reason. All ages.