This isn't the first time Spears has impressed fans with her flexibility. In January, the mother of two posted another handstand pic where she again was wearing tiny shorts and a matching sports bra. "Yoga yoga...feelin better and getting back on the mat," she wrote.
"I like my workouts to be effective in a short amount of time," she told the publication in 2014. "I start with 20 minutes of intense cardio -- usually running -- move on to light free weights, body-weight exercises such as push-ups, squats and sit-ups, then finish it off with a stretch."