7 Celebrity Moms Whose Post-Baby Bodies Will Shock You (PHOTOS)

There simply has to be some sort of magical formula in the water in Hollywood, because even celebrity moms who pack on a ton of weight during pregnancy seem to somehow lose it overnight -- making the rest of us feel like a bunch of fat, frumpy women with cottage-cheese thighs and zero willpower. Seriously -- how do so many famous women manage to bounce right back after giving birth as if they never had a tiny human being living inside their bodies? Take Kristin Cavallari, for example. She just welcomed her son Camden on August 8, making him exactly 2 months old. And this picture of her was taken in New York City just last week -- and serves as evidence that she's already back to her minuscule pre-baby size. (Baby? What baby?)  

Kourtney Kardashian, 2 1/2 months after baby Penelope's birth.

Snooki, 1 month postpartum.

Kate Hudson, 4 months after welcoming baby Bingham.

Jessica Alba just 6 months after baby Haven's arrival.

Miranda Kerr, 6 months postpartum. (For real.)

Kim Zolciak, 2 weeks after baby Kash's birth. (2 weeks?!?)