Since kicking off in 1991, Lollapalooza has had its fair share of ups and downs. With a comfortable residence in Chicago's Grant Park and an all-star 2010 lineup that includes Lady Gaga, Green Day and Arcade Fire, Lollapalooza is set to produce even more rock memories this year. Before Lollapalooza 2010 kicks off on Friday (Aug. 6), come with us as we look back at 10 of the most memorable moments from the festival's wild past, and tell us what stands out in your mind as the festival's defining performance.

Soundgarden & Pearl Jam Enter The Temple of the Dog

1992

2010 makes Soundgarden three-time Lolla vets, and '07 headliners Pearl Jam are twopeaters. But back in 1992. the bands played the fest for the first time just as grunge's star was on the rise, and their short, back-to-back early afternoon sets paved the way for tour-long hijinks. Frontmen Eddie Vedder and Chris Cornell drank bile from the belly of a Jim Rose Circus performer on a side stage. Pearl Jam's Vedder made like Tarzan and swung from the rafters of venues from Wisconsin to Long Island. But they aptly capped the summer by taking the stage together to play "Hunger Strike," the hit by the two bands' one-off co-incarnation as Temple Of The Dog, at the fest's last show in Irvine, California.