'Who doesn't love to twirl all day??': Britney Spears shows off athletic agility as she spins in circles …

The 36-year-old singer took to Instagram on Friday to post a brief clip in which she stood in the middle of her vast living room twirling on one foot. The Grammy-winner wrote in the caption, 'Who doesn't love to twirl all day??' with the clip, in which she was wearing a sheer white top and black shorts with …