Kristin Cavallari took to Instagram to show off her super-slim bikini bod in a tiny black two-piece as she walked hand-in-hand with her son, Camden.
"Paradise with my boys ❤," she captioned the sunny snap.
Looking at that booty, it's hard to believe the former "Hills" star and her football-playing hubby welcomed their second son, Jaxon, just 10 months ago!
So, how did she get her pre-baby bod back?
"I try to work out four to five times a week and I eat incredibly healthy," she recently told E!'s Ken Baker. "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."
Cavallari admitted she's currently "trying to put on muscle."
"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."