To our knowledge, this is the first time Eminem's done Lollapalooza, certainly the first in a headlining capacity. See what a career revival and an insistence of getting all serious (with Skylar Grey cameos) and all timely (with Bruno Mars cameos instead of, say, esophagus comments) and all call-backy (with Royce da 5'9 showing up) can get you? Tens of thousands of festival-goers. MTV has a full writeup, if you're at all interested. Otherwise, watch the highlights below, then go to Rap Radar for more.