WATCH Britney's Good Morning America Performance HERE!

We've got the footage before it's aired on TV!
Okay, now that we've seen the final performance….
She's not 19 anymore. She's 29.
And not everyone is as athletic as Madonna!
The Britney that used to be able to dance fiercely is no longer. We're not exactly sure why she's gone, but - like we've said before - we'd [...]

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