Will Lollapalooza Be Doper Than Coachella? Line-Up Announced...

Eminem, Coldplay, Foo Fighters and Muse will help Lollapalooza celebrate its 20th anniversary this year as they headline the three-day festival, taking place once again in Chicago's Grant Park. Rumors that Eminem would lead the lineup began to roll out in February, but the star-studded lineup wasn't made official until earlier this morning.

Eminem will also prepare for his Lolla stint with a headlining slot at Bonnaroo festival, which takes place June 9-12 in Manchester, Tenn.

Coldplay is the only "surprise" on Lolla's list. Chris Martin and Co. are set to rock out Glastonbury this year and are gearing up to release their fifth album.

Other acts set to stage during the three-day event ― which takes place on August 5-7 ― are: Cee-Lo, Nas and Damian Marley, Kid Cudi, My Morning Jacket, Afrojack, Portugal the Man, Tinie Tempah, Noah and the Whale, Skylar Grey and Jay Electronica.