"Early bird" $175 three-day passes for this summer's Lollapalooza festival go on sale today (March 31). The annual festival will happen August 7-9 in Chicago's Grant Park.

Although the full line-up for this year's festival won't be announced until April 21, all of the headliners -- Beastie Boys, Jane's Addiction, Depeche Mode, Tool, Kings of Leon and the Killers - have been confirmed by Billboard's sources. Fleet Foxes, Andrew Bird, Lou Reed, Neko Case, the Decemberists, and Peter, Bjorn and John are among the more than 100 additional acts that will appear at the festival.

In an interview with MTV [1] earlier this month, festival founder Perry Farrell hinted at expended dance music bookings for this year's event. ""We have a lineup in the electronic world that's a who's who of electronic artists," he said.

"VIP Lolla Lounge" tickets will also be available starting today at lollapalooza.com.

The 2008 edition of Lollapalooza sold out all three days for the first time since the festival was reborn as a weekend-long stand-alone event in Chicago.