Because she choreographed it

http://www.youtube.com/watch?v=JBF9o...layer_embedded

Plus she is wearing heels. In the original version she was on fire but she was wearing sneakers so I guess that's the difference between old britney dancing and new sexy britney dancing.

She on tour is amazin.

I have to say that i think Britney Spears is an amazing performer and all round entertainer, however, her dancing has been rather lacklusture and not really up to the mark in the past 5 years or so.

BRITNEY REALLY NEEDS TO GO BACK TO DANCING LIKE SHE USED TO, FOR WHICH SHE BECAME A HUGE SUPERSTAR.

I would say Britney needs a great team of choreographers, who really push and help excel her.

Britney needs to take the heels OFF and get back to the FLATS. I want some real kick-ass moves.

she need to take those heel off. she cant bring it like she used to with them on.

Well when I saw her her danceing was great, it's odd cause in the YouTube well some she isn't as perfect as she use to be, but when I saw her do slave 4 u she danced really well to it.