Heather Graham's 40th birthday celebration hit new heights as she performed onstage with acrobatic dance troop Cirque du Soleil in Las Vegas. Graham's boyfriend, film director Yaniv Raz, organized a surprise trip to Sin City for the Hangover star's special day, which began with a special Pilates warm-up class at Ka, the Cirque du Soleil show at the MGM Grand hotel.

She was then ushered into the Ka theater, where she was buckled into a harness and taught how to jump and slide face-first down a 50-foot vertical stage, according to the Las Vegas Sun.

She later told the cast, "This was a blast, even though I'm slightly afraid of heights. It was always my dream to fly onstage with Cirque du Soleil, and you've helped bring my dream to life."

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