Lollapalooza Chile is set to take place from March 31st - April 1st in Santiago's O'Higgins Park. The lineup includes Bjork, Arctic Monkeys, Foo Fighters, Gogol Bordello, MGMT, and many more.
The following weekend (April 7th & 8th), Lollapalooza Brasil will take form at The Jockey Club in Sao Paulo. Plus or minus a few bands, their lineup isn't much different than Chile's.
Pre-sale tickets for both festivals will be available later today.
Our own Lollapalooza says, "2012 Lineup & 3-Day Passes go up in the spring."