Happy birthday, Beyoncé! The 32-year-old has had quite the year; from show-stopping performances and sunny vacations to her directorial debut, whatever she's doing, Beyoncé knows how to wow. Since having daughter Blue Ivy in 2012, the singer has been hard at work on looking and feeling her best. In fact, when she debuted her postbaby body at a concert just a few months after Blue's birth last year, she even acknowledged how hard she's been sticking to her strict diet and exercise regime. "I had to lose 60 pounds. They had me on a treadmill. I ate lettuce!" she told the crowd. Of course, it's a lot more than that. Here's how Beyoncé's philosophy has evolved throughout the years to help her stay healthy and fit.