Former Hills baddie Kristin Cavallari isn’t letting pregnancy slow her down.

The reality star, who is pregnant with her second son in as many years, opened up to Us Weekly about how she’s making the best of the final lap of her pregnancy and looking good while doing it.

Kristin, who seemed to snap back from her pregnancy with son Camden virtually overnight, credits her bangin’ post-baby bod to maintaining some semblance of control over her eating habits and exercise plan during her pregnancy.

“I'm eating the same I normally do, and I'm working out but I'm not killing myself. I just don't use it as an excuse to go crazy, I guess," Kristin reveals. "I've been doing videos at home and I've been doing lots of squats and lunges and really trying to focus on my legs and my butt."

While Kristin can’t wait until her bun in the oven is fully cooked, admitting that she’s “counting down the days” until her pregnancy is over and feeling “like I have a bowling ball in my stomach,” she’s keeping her spirits up with the help of her NFL star hubby, Jay Cutler.

“He had been wanting kids since I met him," admits Kristin. "So he's really excited."

Source: Us Weekly