Megan Fox looked hot in a tank top and skinny jeans as she's back filming "Teenage Mutant Ninja Turtles in Tribeca, New York on Saturday, just days after playing with her two-year-old son in Beverly Hills, LA.

"The 29-year-old brunette showed off her slender figure in a black tank top and low-rise skinny jeans that gave a glimpse of her toned and tanned tummy," said Daily Mail. "She tucked her jeans into high-rise black boots with chunky cuban heels and tied a black and blue plaid shirt low on her hips."

On Wednesday, "Teenage Mutant Ninja Turtles" star Megan Fox was snapped carrying Noah in her arms in the park, and proving once more that having good genes makes it easier to regain one's hot body shortly after giving birth.

"Wearing a blue Nike vest top underneath a grey low v-necked T-shirt, she wore her chocolate tresses down in a casual side part," the British publication said.

"Megan chilled out in the heat in a pair of royal blue leggings with a floral motif on them, showing off her flat tummy with her T-shirt knotted at the waist," it said.

Trainer Harley Pasternak revealed to Us Weekly Megan Fox's secret to achieving the hot body in no time.

"She eats carbs. She just eats the right carbs. She has a low-sugar diet. It's so sustainable, it's so moderate, she's not doing any zero this/zero that," he said of the "Teenage Mutant Ninja Turtles" star.

The trainer added, "She eats three meals and two snacks a day. She'll have protein, fiber, and healthy fat every meal. She is living a low-sugar lifestyle, definitely... She has definitely buckled down and she is amazing."

"Here's a busy mom of two kids, well really three kids, and she's doing it. She's sticking to it, and she realized she doesn't have to make elaborate meals in the kitchen," he added.

"In the morning she'll do a smoothie or an egg white omelet with some avocado as healthy fats. And she'll have hummus and cut veggies as a snack and a salad with grilled chicken for lunch."