Star Spotting

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Ben Harper performs with Eddie Vedder and Pearl Jam at the Hard Rock Calling in Hyde Park in London.

Kent/WireImage

Jay-Z performs at the Barclaycard Wireless Festival at Hyde Park in London.

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Lady Gaga crowd surfs during the Semi Precious Weapons performance at Lollapalooza

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Eminem and Jay-Z perform at Comerica Park in Detroit.

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Yoko Ono and Lady Gaga perform together during the We Are Plastic Ono Band event in Los Angeles. What a crazy kooky cool collaboration!!

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I heart> FIREWORKS!

Cooooooooool.!

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Katy Perry performing at the Victoria Secret Fashion Show in NYC.
What I would give to go to something as epic as that.

She's like a cutesy Lady GaGa. She's grown on me.

Team Katy!