Sadly I don't think Kelly will be performing
She has a concert the night before in Missouri and the day after in TX. I don't really see her flying out to the VMA's and then to TX right after. It's possible though. She did something crazy like that for the Super Bowl.
Might it be possible that Gaga would debut her lead single at the VMA's? There's always one huge performance..
I'm sure P!nk will perform Blow Me