Britney Spears has clearly been hitting it hard at the gym.
The "Work B**ch" singer shared a pic with her 4.8 million Instagram followers on Sunday that showcased her fit physique. Donning a yellow string bikini top, Spears has never looked happier posing next to her beau Charlie Ebersol, 32.
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"So nice to be home!" the 33-year-old pop star wrote. "Nothing like Louisiana boys."
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This past December, Spears shared some of her workout secrets toWomen's Health. "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," she said, adding that dancing "is a great cardio workout."