While most celebrities are working hard to be thin, Kristin Cavallari is looking to bulk up her skinny frame.

“Because I have no curves … I can look really skinny and I don’t like that look,” the former “Hills” star told E! News. “So yes, I’m drinking protein shakes, I’m trying to put on muscle and I’m lifting very heavy weight right now.”

The 28-year-old said she doesn’t know “why or how” but “after I had children my body literally changed.”

“And now, for me, it’s about trying to keep muscle on and gain muscle, so that, yeah, I don’t look too thin,” she said.

The shoe designer, who has two kids with husband Jay Cutler, is hitting the gym four or five days a week and maintaining a healthy diet. “I eat incredibly healthy,” she said. “I’m the kind of person that does not eat any toxic chemicals … I just try to eat real food.”

Click here for more on this report from the New York Post.

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