Not really. She's sung it live loads of times, at her own mini-concerts and on Femme Fatale tour, etc.
(When she sings it on her own, she sings the whole song.)
I have watched 2 performances. She can't sing it as good as the album version because it was auto-tuned. I hope she improved. The last live performance I saw from her is Dancing With The Stars and she sounded good.