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Kristin Cavallari

Instagram

Kristin Cavallari is putting her best assets on display!

The reality TV star Instagrammed an adorable picture of herself walking with son Camden Jack Cutler on the beach and we're immediately gushing and saying "aww." But we also couldn't help but notice Kristin's very teeny bikini! The tiny swimsuit showed off a good portion of her butt.

She captioned the sweet pic, "Paradise with my boys."

The mom looks to be in incredible, bikini-body shape after having two kids with husband Jay Cutler, but the fashionista revealed to E! News that she works really hard to look the way she does, even if it means some people believe she's too skinny. "There's no real secret, I work my butt off in the gym," she told E! News. "I woke up at 5:30 a.m. and went and walked uphill on the treadmill for 30 minutes."

By now people know half the battle is also what you put into your body, so when we asked her all about her diet she dished that she tries to eat only the good stuff: veggies!

Kristin Cavallari, Jay Cutler

Splash News

"I try to work out four to five times a week and I eat incredibly healthy," she shared. "I'm the kind of person that does not eat any toxic chemicals…I just try to eat real food. I think probably the best tip is that I try to always get a vegetable in somehow, even in the morning if you're making a smoothie, you can throw some spinach in it and it's an easy way to get a serving of greens."

But sometimes, try as you might, you don't see the results you want, which for Cavallari includes gaining more muscle. The NFL star's wife admitted to E! News that sometimes she's very critical of her own appearance.

"I don't 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 explained. "It's very easy, because I have no curves, that I can look really skinny and I don't like that look. So, yes, I'm drinking protein shakes, I'm trying to put on muscle and I'm lifting very heavy weight right now."

Based on her latest Instagram it's safe to say she put on that muscle! Camden and Jaxon Wyatt Cutler's mom looked incredible in her bathingsuit!