November 11, 2013 05:19 PM

Courtesy InStyle

She may look pretty athletic when she’s sprinting through the jungle and wielding a bow and arrow in the Hunger Games movies, but in real life, the newly short-haired Jennifer Lawrence wants to make one thing clear: That’s all thanks to the magic of the movies.

“Nothing can motivate me” to diet and exercise, the actress says in InStyle‘s December issue. “During Hunger Games, when I was eating ungodly amounts, I used to tell myself, ‘Stop eating, people are going to see this. This movie is going to be around forever.’ But nope! I was like, I still want candy and I still want a hot dog!”

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She then thought she’d be more disciplined for the X-Men movies, in which she wears blue body paint and nothing else (the writer confirms). But that didn’t pan out either. “Then X-Men started, and I thought, ‘Oh definitely, I’ll work out and diet.’ But nope. Not me!”

About that blue body paint: It comes with an occupational hazard, and we’re not just talking about being naked on set half the time. “It’s like wearing rubber paint,” she says. “Very dehydrating. I drank bottle after bottle of water and I only peed twice a day.”

But while she was willing to strip down and suffer perpetual thirst, there was one thing she wasn’t willing to do for her role as Mystique: dye her hair. The InStyle story was written pre-pixie cut, and though Lawrence lamented the “awkward length and awkward color,” she was firm about one thing: “No more color after Hunger Games — it’ll all fall out.” So now we know the new look is less for style purposes and more for a fresh start.

For lots more on the always-amusing (and super beautiful — just wait ’til you see the photos) Lawrence, pick up December’s InStyle on stands Friday, and be sure to visit for the full style retrospective.

What do you think of Lawrence’s statements? Are you excited for her new movies?

–Alex Apatoff

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