Beyoncé is sharing her secrets on how she stays in shape while on her "Mrs. Carter World Tour." The tour, named for her husband Jay-Z’s legal name, Shawn Carter, is set to travel to 15 European countries before coming to the United States June 28. Beyoncé’s last major tour, in 2009, was the “I Am ..." world tour. She and Jay-Z had their first child, Blue Ivy, last year. 

While the 31-year-old megastar certainly keeps her body toned with her nightly performances, she reveals that she eats quite healthy too. On Tuesday, she posted a photo on her official Tumblr site of her dinner, which had salad Niçoise as a starter, which is a mixed salad of tomatoes and green beans topped with tuna and anchovies. That dish was followed by a sweet potato, chili and coconut soup. Her main course was marinated, pan-seared medallion of beef and vegetables.

Though she eats very healthily, Beyoncé also admitted that she has a sweet tooth and posted a picture of chocolate cake after revealing her dinner menu. While she indulges in her sweet tooth at times, based off her diet regimen, it is no wonder Beyoncé has such an enviable body. And this is not the first time she has revealed diet tips. Back in March, the new mother showed off her post-baby body on the cover of Shape magazine and opened up about how she shed the 57 pounds she gained while pregnant with Blue Ivy.

A strict diet and exercise regimen is key. Shape Editor-at-Large Bahar Takhtehchian said in May that Beyoncé combined cardio, lunges and a diet full of veggies and lean meat to lose the baby weight.

In February, Beyoncé's personal trainer, Marco Borges, spoke to Life & Style magazine about how he helped whip the mom in shape. Borges said he put her on a partially vegan diet, with “one vegan meal a day, because this typically gets people to eat more greens than they normally would."

He added, "Consistency is the key to success. I love running-sprint intervals for quick cardio sessions and also ... running stairs." Although Beyoncé’s weight loss is impressive, she said in the shoot for Shape that it isn't necessary to be stressed out if you aren't the exact size as the women in the media. "Not everyone is supposed to be the same. Be healthy and take care of yourself, but be happy with the beautiful things that make you you."