A week after news leaked about Lollapalooza's headliners this year, the fest has made it official. Eminem, Outkast and Kings of Leon are top-billing the three-day music festival, which runs Aug. 1-3 at Chicago's Grant Park.

The lineup also includes Arctic Monkeys, Skrillex, Lorde, the Avett Brothers and Foster the People.

Dozens of other artists will also play Lollapalooza this year, and the wide range of artists spans everything from indie rock and R&B to hip-hop and electronic. Spoon will be there; so will Jenny Lewis. Nas, Blood Orange and Parquet Courts are also scheduled to perform.

Single-day tickets go on sale today for $100. Three-day passes sold out a while back.