Britney Spears Takes Fans Inside Her Intense Workout Routine: 'But I'd Rather Be Dancing'

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Mariah Carey might work out in heels, but Britney Spears works out in a bikini top.

On Tuesday night, the 35-year-old pop princess posted a video to Instagram of herself and her personal trainer doing a set of side lunges with weights, an exercise she admits isn't her favorite. "Training keeps me motivated and inspired... but I'd rather be dancing," Spears captioned the video.

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This recent post is just another glimpse into the "Work B**ch" singer's strenuous workout routine. The mother of two has also shared videos of herself doing ab exercises, forward lunges and yoga.

All that hard work in the gym is paying off! A few weeks ago, Spears shared a video of herself frolicking on beach in a teeny yellow bikini.

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During an interview with Women's Health, Spears admitted that she doesn't like to spend a lot of time in the gym. "I like my workouts to be effective in a short amount of time," she explained. "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."

Here's a look at another one of Spears' workout moves

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