Whether she's on stage or filming a music video, it's pretty obvious Shakira [1] loves to show off her body and amazing belly-dancing skills [2]. As she gears up for a new world tour [3], she's hitting the gym more than ever, while juggling two little kids [4] and spending time with her longtime partner, Gerard Piqué [5], but no matter how busy she is, the Colombian singer always finds time to eat healthy, according to her trainer Anna Kaiser.

Kaiser spoke to E! News about Shakira's diet [6], revealing one simple secret behind her regimen. Shakira [7], Kaiser said, eats three meals a day ("breakfast, lunch, and dinner with a protein in every meal and fresh veggies or small amounts of low glycemic fruit"), and for a snack midafternoon, she reaches for . . . soup. Instead of grabbing a sugary snack, Shakira has some broth. "At the four o'clock hour, when people are craving caffeine and a cookie, soup is a really great option because it fills you up and feels like a meal so it can keep you going until dinner, but it's not hugely caloric," Kaiser said.

That doesn't mean the singer doesn't indulge every once in a while, but she's definitely not grabbing processed foods. "We would do a cacao topped rice cake or half of a protein bar, or I got her some chocolate tea which kind of feels like a treat with some dehydrated fruit," Kaiser said. "So it's about allowing yourself to have a lot of different things in small quantities and keep it as fresh as possible."

So the 40-year-old singer doesn't get bored, Kaiser comes up with a colorful and varied meal plan and works with Shakira's chef to cook it. "We did some protein shakes, protein pancakes, and I would peel a couple of oranges and slice them up and top them with turmeric and cinnamon. It is pretty much about making it fun and different and also the presentation," she said.