!["I love running sprint intervals for quick cardio sessions and running stairs."](http://cdn2-b.examiner.com/sites/default/files/styles/image_content_width/hash/7f/ff/1361291292_5171_Untitled.jpg?itok=q5wujpHn ""I love running sprint intervals for quick cardio sessions and running stairs."")
Singer Beyonce Knowles lost 57 pounds several months after giving birth to daughter Blue Ivy in January 2012, and has kept it off by following a partially vegan diet.
"[Beyonce eats] one vegan meal a day because this typically gets people to eat more greens than they normally would," her trainer, Marco Borges, told Life & Style. "If you have to snack, don't sacrifice nutrition."
Instead of grabbing chips or candy, Beyonce snacks on edamame, a green apple, or cucumbers sprinkled with vinegar, cayenne pepper and lemon. When the Grammy winner wants to shed weight fast, she substitutes a protein shake for lunch instead of having a full meal.
Knowles, who wowed fans with her super-fit physique during her Super Bowl half-time performance, wore multiple layers of pantyhose to achieve her sleek look.
"Under the fishnets, she wore four to six pairs of pantyhose to pull her all in," says a source. "She is very aware of her body. She knows what looks right and what doesn't."
In addition to a healthy, portion-controlled diet, Beyonce also works out almost daily to maintain her sexy bikini body.
"Consistency is the key to success," says her trainer. "I love running sprint intervals for quick cardio sessions and running stairs."
