While most struggle to shed their baby weight, celebrities like Jennifer Lopez have done it effortlessly, all thanks to a new French diet, which claims you can eat whatever you want and yet not put on the pounds.
The Dukan diet is fast becoming popular and it is already Amazon's No1 diet book - even though it doesn't go on sale until May 13.
More than 1.5 million French women already swear by the slimming regime devised by nutritionist Dr Pierre Dukan 10 years ago. And over the last decade it has spread by word of mouth, web forum and blog to 20 countries.
Lopez, 40, who is a firm believer of the Dukan diet, lost a lot of weight and regained her foxy figure two years after becoming mum to twins Emme and Max.
"I just remember being pregnant and marvelling at the hugeness of every area of my body," the Mirror quoted Lopez as saying.
"I'd stand there naked and look in the mirror from all angles. I did marvel at how my already ample rear end was now humongous! I worked out a lot. I struggled to get rid of the last 20 pounds. I had to change my eating habits after having the twins. I eat a lot less now than I used to. But I love bread and you're not allowed bread with most diets," she explained about her weight loss.
Supermodel Gisele Bundchen, who gave birth to son Benjamin four months ago, has also sprung back into super-slender shape and was even confident enough to wear a clingy, purple dress in Paris earlier this month.
Jessica Szohr, the star of TV teen drama Gossip Girl, says the diet suits her perfectly because it lets her keep up her daily rhythm of sport, filming and shopping without feeling like she's on a diet.
"I eat lots of animal and vegetable proteins in the form of meat and soya and I never feel hungry. If I overindulge, I make up for it the following day by exercising or by eating smaller portions," she said.