The annual edition of Lollapalooza happened over the weekend in Chicago, Il. Acts ranged in notoriety from underground Indie to international pop star. But as you’ll soon see, it was Lady Gaga that had the most gossip worthy appearance.

During the set of Semi Precious Weapons, friends of and often opening act to Lady Gaga, the always attention grabbing Gaga stormed the set and proceeded to crowd surf in some VERY provocative gear. Naturally, more than a few people copped a feel. I guess she truly is a pop star of the people. Check out the video below for a visual.

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The folks at Last Night’s Party also have some really quality pics posted of the incident, and of other action at the festival– which are slightly NSFW. If you’re cool with that, click me to head on over to check them out.