Ultra just keeps pumping out news. The latest being the worldwide festival premiere of Jack U. Diplo and Skrillex’s announcement was issued through a short video on Ultra’s Instagram account, that you can watch below. Adding Jack U to the already stellar Miami lineup is amazing; the festival’s appeal just got a little heightened in some people’s minds I’m sure. I mean, wouldn’t you want to be at the festival premiere of Jack U? If you haven’t purchased your tickets already, you may do so here.