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More than 100 million album sales worldwide, five Grammy wins, 21 million Twitter followers, the highest line of celebrity fragrances on the market and an estimated net worth of $200 million -- with stats like this, it's no wonder Britney Spears landed on the First Annual ET Power List!

VIDEO: Britney's Most Embarrassing X Factor Moment

This year has been especially eventful for the pop diva, as she made a splash in the world of reality television by joining Simon Cowell's The X Factor, but her proudest moment of the year had nothing to do with the singing competition.

Britney tells ET that "seeing [her] children in gymnastics class" ranked No. 1 among her most gratifying moments of 2012.

Previous honorees on our Power List include trailblazing ladies like Jennifer Lopez and Jessica Simpson. As another history-making woman, Britney let us know one thing she can do better than any man.

"Organizing and keeping things clean," says Britney, who became engaged to boyfriend Jason Trawick in 2011.