Kristin Cavallari's Skinny Selfie—Less Than 7 Months After Giving Birth!—Will Make You Regret That Thanksgiving Feast

Kristin Cavallari's Skinny Selfie—Less Than 7 Months After Giving Birth!—Will Make You Regret That Thanksgiving Feast, If only we could take back that second piece of pumpkin pie...

Kristin Cavallari took to Instagram on Sunday to show off her insane post-baby bod, proving she's not only a multitasking mom, but also a fitness lover.

"Just got a nice little workout in. Yes those are baby monitors behind me. #GottaLoveNapTime," the mother of two captioned a selfie in which she's posing in a sports bra and a pair of fitted leggings, seemingly putting us all to shame in the workout department

Despite having two kids under the age of three, the blond beauty still found time to tone that tummy during her busy day and opted to document her hard work on Instagram to which we simply say: holy abs, K.Cav.

Jay Cutler's wife gave birth to son Jaxon Wyatt on May 7. The lovebirds' little one is the second child for the pair, whom are already parents to 2-year-old Camden Jack.

Earlier this year, Cavallari flaunted her tiny frame, which was already back in tip-top shape barely 12 weeks after she welcomed Jaxon, during an appearance on E! News, where she revealed how she got her body back so quickly.

"I'm a freak about what I put in my mouth," the fashionista dished of her post-baby diet. "I'm constantly reading labels and I don't eat any toxic chemicals, so I think that plays a huge role. I'm breast-feeding, which burns a ton of calories, and I can probably just thank my mama too, you know."