It seems like Lollapalooza is the last of the big US festivals to announce their lineup. The Chicago Tribune learned the four headliners today, though, and revealed that they are Eminem, Kings of Leon, Skrillex, and Arctic Monkeys; considering the fest's past headliners, it's a pretty lackluster bunch. The festival takes place from 1 - 3 August in Chicago's Grant Park and last year's festival sold out entirely in a matter of minutes.

Em headlined just three years ago and Kings of Leon performed back in 2009. Skrillex was there just last year under his side project name Dog Blood, and both him and Arctic Monkeys played in 2011. This will be the Arctic Monkeys' first time headlining a major US festival, although they've been doing it around the world for a while now. Here's to hoping they went cheap on the headliners to book some amazing mid-level acts! The full lineup will be announced next week.