Britney Spears 'Really Wants a Cheeseburger' After Stripping Down at Billboard Music Awards

The "Work Bi*ch" singer is rewarding herself with a calorie fest!

After winning the Millennium Award and giving a show-stopping performance at the 2016 Billboard Music Awards on Sunday, Britney Spears was ready to reward herself with a high-calorie meal.

The 34-year-old pop princess opened the show with a medley of her hits, and shocked fans when she stripped down to a barely-there costume, revealing her fit physique. Spears posted a pic of herself from the performance, writing: "After tonight... All I really want is a cheeseburger ? #BBMAs."

WATCH: Britney Spears Goes Pantsless in Sheer Billboard Music Awards Red Carpet Look

The "Work B**ch" singer deserves if after that dance-heavy stage show!

Spears also thanked her fans and support system, writing: "This award and this night meant the world to me... Thank you @bbmas, my amazing crew, dancers and of course my fans."

MORE: Gigi Hadid Says She Eats 'a Couple Cheeseburgers a Week'

Ahead of Spears' sexy performance at the BBMAs, designer Mark Zunino spoke to ET about the inspiration behind her revealing getup. "There was an enormous amount of hand-beading involved with many of the pieces," he explained. "Britney's body is so toned that we were able to forgo using nude illusion and were able to have hand draped crystals swaged on her actual body."

WATCH: The Best, Worst and Weirdest Moments of the Night at the 2016 Billboard Music Awards