Excited for Lollapalooza 2011? We are too because this year's festival is going to be big. Industry sources are already confirming that Eminem, Muse and Foo Fighters will be headlining acts for Lollapalooza 2011 taking place in Grant Park, Chicago, IL (Aug. 5-7). Other acts are said to include Best Coast, Girl Talk, Crystal Castles and Lykke Li with at least three more headliners set to join.

The complete list of the Lollapalooza 2011 lineup is slated to be officially announced sometime in April.

Related: Kanye West will headline Lollapalooza Chile in April.

[Chicago Now via Turn It Up Blog]