Kristin Cavallari has bounced right back into pre-pregnancy shape only about 12 weeks after giving birth to her second son, Jaxon Wyatt. Many would like to know just how this happens.

Cavallari made a fabulous return to the red carpet for the International Fashion Film Awards in Beverly Hills Sunday and looked as though she hadn’t just carried a baby for nine months.

Her workout had a lot to do with Kristin Cavallari’s quick transformation. Just three short weeks later, she was working out four to five times a week for 30 to 45 minutes. Wow. She must have been getting a lot more sleep than most mothers of newborns get!

“I’ve really been focusing on my legs and butt,” Kristin Cavallari said. “My stomach needs the most work but that takes time more than anything and diet plays a huge role.”

Diet definitely plays a huge role in losing that baby weight. What is Kristin Cavallari’s diet secret?

“I’m a freak about what I put in my mouth,” Kristin Cavallari said on Friday. “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.”

Ah, genetics. The word that takes away hope from the masses. Well, at least we can help the eating part.

Kristin Cavallari admitted that she has enjoyed having both of her boys at home up until a few days ago when her first son, Camden, suddenly hit those “terrible twos”.

“He’s been great, up until the last two days,” Kristin Cavallari said. “Yesterday I was feeding Jaxon and he threw a sippy cup at his head and started to kick him, so we’re sort of in that phase right now.”

Yeah, some of us have been there and understand how that goes. She did say that Camden’s attitude is generally good and he likes to help mama with the baby. That’s a good thing since Kristin Cavallari’s husband, Jay Cutler, has been out of town. The Chicago Bears’ star quarterback has been at training camp. It’s that time of the year!

Motherhood isn’t all that Kristin Cavallari has going on right now, as if that isn’t enough. She is also rolling out her fifth Kristin Cavallari by Chinese Laundry shoe collection that is incredibly popular.

Congrats to Kristin Cavallari and Jay Cutler on their new addition!

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