The 28-year-old Czech-born model and actress posed in April for a Victoria's Secret ad shoot in a skimpy, black bikini, just four months after she gave birth to Flynn, her son with actor Orlando Bloom.
How did she do it?
Breastfeeding, yoga and a focus on eating healthy foods like Goji berries and almonds, she told Us Weekly.
Whether you are a celebrity, a new mom or just looking for a new start, Us Weekly has these tips and snack ideas for a new you in the New Year.
Go for a green smoothie because it's full of calcium, and vitamins too.
When celebrities need a snack, they often reach for watermelon to fill them up without filling them out.
Dates and red peppers are great sweet and healthy snacks to eat when on-the-go.
Add a few drops of coconut oil to your coffee to help burn extra fat.
Eat spicy foods to suppress your appetite.
Instead of using a small fork, go for the big one. Studies show that seeing food disappear faster makes you more satisfied.