Britney Spears was trained in gymnastics and dancing it seems very young.
(link)
(link)
(link)
You know, a lot of dancers can do back walkovers now, and me in gymnastics classes age 1 3/4 - 8 going twice a week by the end was considered good but never did the things cheerleaders do and was struggling with my back walkover at the end. I didn't really dance until my mom put me in ballet at 5. Thereafter, I wanted to stay. I never wanted to do gymanstics like they do seriously, neither. I just used it for sport... to be attractive actually. I figured if I did too much I'd be too different. Still, I just joined an expensive gym and am doing as much as possible class-wise.


