Katy Perry Biggest Weakness Revealed!

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Katy Perry is on a diet and she's not too thrilled about it. The best part about her diet is her cheat day where she gets to grub on some burgers.

Katy's body has been looking bangin' these days and she reveals her secret saying that it's a lot of working out and being on a meal plan. Boring!

"After this interview I'm going to have a nice healthy breakfast," she tells Rolling Stones. "I'm on a meal plan, which absolutely sucks -- but on Sundays I get to have a cheat day where I go buck wild and eat In-N-Out Burger."

I wanna know if there's anyone on the west coast who actually isn't obsessed with In-N-Out Burger! That's one thing the west coast has on the east.

Katy is on the strict diet because she’s prepping for her 95-date tour that kicks off in Portugal on February 20.