The reality star (who is now pregnant with baby number two) reportedly lost most of her baby weight after giving birth to North West by following the new Atkins diet.
Not the "eat all the meat, cheese and butter you want" Atkins diet of yesteryear, this new version of Atkins focuses on low-carb, clean eating -- think three lean-protein-packed meals a day with plenty of fruits and veggies, plus two snacks like nuts or low-glycemic fruit. Oh, and plenty of water.
A year after giving birth, she took to Twitter to express her frustrations that she couldn't lose those last 15-20 pounds -- that's when she amped things up and cut further back on the carbs, and ramped up her workouts.
She also told Harper's Bazaar that she usually works out around 6 a.m. in the morning for an hour and a half, starting with a run and finishing with abs or legs exercises.
If you take a look through photos of the gorgeous Blake Lively while she was sporting her baby bump, you'll see that she took care to remain active throughout her pregnancy. She reportedly took pre-natal yoga classes, and, after giving birth, made sure to go on plenty of walks. She also told You magazine that she hates the gym, and would rather focus on gentler workouts like hiking or bike riding.
Is it just us, or does it seem like every woman in Hollywood has recently given birth? From superstar singers like Beyoncé and Carrie Underwood to mega movie stars like Blake Lively and Kristen Bell, we've been inundated with paparazzi snapshots of adorable baby bumps.
And now, we're getting a steady stream of those new moms' never-looked-better bods.
Of course, we could hate these women for their post-baby bodies (and the live-in trainers and personal chefs who helped them lose the baby weight so quickly). Or, we could uncover the secrets that helped them look so good so soon after giving birth and apply those tactics (at least the sane ones!) to our own no-personal-trainer-here lives.
Since option No. 1 just makes us feel bitter, we're going with option No. 2. Keep reading to get the dirt on how Hollywood's hottest new moms get fit fast.