Astute listeners keep catching new Skrillex material during DJ sets. Last year, a fan noticed when Mija slipped Skrillex's collaboration with Chance the Rapper into her playlist. Over the weekend, the producer appeared to unveil a hard-hitting new song featuring Rick Ross while DJing in Atlantic City. Biggest boss and I've been the trillest, Ross raps. But I'm a bigger problem when I click with Skrillex.