Additional confirmed acts are Additional confirmed acts are Sonic Youth, Thievery Corporation, Sleater-Kinney, Nickel Creek, Poi Dog Pondering, Coheed and Cambria, The Secret Machines, Eels, Panic! At the Disco, The Disco Biscuits, She Wants Revenge, The Dresden Dolls, Reverend Horton Heat, The Smoking Popes, Andrew Bird, Gnarls Barkley, Stars, Cursive, Blackalicious, Editors, Lyrics Born, Lady Sovereign, Calexico, Nada Surf, Feist, Aqualung, The Frames, The Hold Steady, The Go! Team, Mates of State, Pepper, Particle, The Redwalls, Mute Math, Wolfmother, Sparta, The Subways, Of Montreal, Blue October, Jeremy Enigk, Living Things, Sound Team, The M's, Hot Chip, The Benevento-Russo Duo, Matt Costa, The New Amsterdams, Deadboy & The Elephantmen, Sybris, Anathallo, The Burden Brothers, What Made Milwaukee Famous, Manishevitz, Husky Rescue, The Towers of London, Ohmega Watts, Boy Kill Boy, Jim Noir, The Standard, Be Your Own Pet, Elvis Perkins, Trevor Hall and Midlake.

"We want the fans to discover and explore," said Perry Farrell, founder and creator. "That's what Lollapalooza is all about: sounds of all genres swirling about as you walk through the expanse of Grant Park."

An unannounced, specially priced ticket sale for e-list subscribers proved Lollapalooza's buzz quotient, as 3,000 $45 three-day passes sold out in 33 minutes. Three-day passes are now $130.

In addition to five stages of music, the event will "incorporate art, fashion, food, activities for kids, cultural elements and sensory surprises that the Lollapalooza experience is known for," according to a press release.

This year marks the second time that Lollapalooza, which first took place in 1991, will be staged in a single city rather than as a traveling tour. The 2004 edition of Lollapalooza was scrapped due to weak ticket sales.