Lollapalooza may be close to deals with a number of large acts for the 2010 line up, including Soundgarden, Lady Gaga, Arcade Fire, The Strokes and Green Day.
Soundgarden, Laday Gaga and Green Day would be the headliners, according to a report from The Daily Swarm, which cites multiple (unnamed) industry sources.
"Although promoters do not traditionally announce the lineup until spring, multiple industry sources have told The Daily Swarm that the three headliners are locked in for the Aug 6–8 weekend event. Three more headliners are expected to be included when the complete lineup is announced."
Greg Kot of the Chicago Tribune has called out Arcade Fire, The Strokes, Dirty Projectors, The xx, Cut Copy, Hot Chip and Yeasayer are working out negotiations with Lollapalooza organizers. He also cites unnamed sources, but has a very good track record in spilling line up details before the official announcement.
Lollapalooza happens on August 6th - 8th in Grant Park in Chicago. Check out the Spacelab Festival Guide for more information on Lollapalooza.