Kristin Cavallari can't help being genetically gifted.
But she acknowledges that diet, exercise and breast-feeding have all played a role in how she bounced so quickly back into shape barely 12 weeks after giving birth to her second child.
"I'm a freak about what I put in my mouth," the fashionista and mother of two said during a sit-down on E! News Friday, taking a break from guest-cohosting duty. "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."