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Katy Perry Reveals Her Fast Food Indulgence

Originally posted 01/29/2013 11:30AM

How does Katy Perry get that perfectly curvy bod? With lots of hiking, a little bit of training ... and the occasional double cheeseburger.

"I've cut out most fast food," the popchips spokesperson, 28, told PEOPLE last week. "The only thing I stop for now is In-N-Out Burger."

Perry, who's been going strong with beau John Mayer for several months, also has a new work out addiction.

"I'm really obsessed with getting my steps in now," says the songstress, who recently purchased an UP by Jawbone activity tracker. "You create a team and everybody's competitive about who gets the best steps in and it also tracks your sleep."