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You know that when one of the most popular video games on the planet launches a new version, that the celebs are gonna line up to be some of the first ones to play, and that's exactly what happened when Best Buy presented the Guitar Hero World Tour Launch event over the weekend!

The event was hosted by Mark McGrath and featured a performance by the Smashing Pumpkins. But they weren't the only ones to perform, Mischa Barton, Karina Smirnoff, Ryan Eggold, Britanny Snow, Carmen Electra, Adam Gregory, TOOL, Macy Gray, Tori Spelling, All American Rejects, Mischa Barton, Jessica Lowndes, The Kardashian Family, Hoobastank, Jaime Kennedy, Robbie Amell, Jonthan Bennett, Shannonn Woodward, Bad Religion, Golden Brooks, The Donnas, and Brody Jenner all showed up to test their Guitar prowess!

And check out the All-American Rejects in the vid below, butchering Pat Benatar's Heartbreaker...while still managing to look adorable!