Whee! Stars on Roller Coasters and Kiddie Rides

They're getting loopy! Katy Perry, Emma Roberts & Chord Overstreet, Kelly Osbourne and more stars go for big thrills in the summertime

HUGH JACKMAN

He's all strapped in and ready to go! Jackman gears up for the Green Lantern roller coaster – the new stand-up thrill ride at Six Flags Great Adventure – while visiting the Jackson, N.J., theme park June 22.