Lollapalooza 'early bird' 3-day passes sold out

March 27, 2012 3:28:12 PM PDT
Three-day passes for Lollapalooza 2012 went on sale Tuesday morning and music fans are quickly buying them up.

By Tuesday afternoon, the souvenir and "early bird" three-day passes were sold out. Regular three-day pass were still available.

Lollapalooza will take place August 3 through August 5 at Grant Park.

All those people buying tickets aren't certain who they will see perform because the official lineup won't be announced until April 11.