Lollapalooza is celebrating its 20th anniversary by expanding itself internationally from Chicago to Chile. It will take place in Santiago's O'Higgins Park April 2nd and 3rd 2011. 

The headliners of Chile’s Lollapalooza are The Killers, Kanye West, and the Yeah Yeah Yeahs. Other acts performing in Chile are Thirty Seconds to Mars, The Deftones, Cold War Kids, CSS, and Fatboy Slim. 

The headliners for the original Lollapalooza in Chicago have not been declared yet. The dates for Lollapalooza Chicago are August 5th thru the 7th. 

The most notable of the act is Kanye West. Kanye West has recently released My Beautiful Dark Twisted Fantasy, plans to release Watch the Throne with Jay Z, is currently scheduled to perform at Coachella, as well as Lollapalooza Chile.

More informational about Lollapalooza in Chile can be found on their homepage and twitter.