What the hell- I have to admire her tenacity, she's such a laughing stock nowadays, the last thing you'd expect her to do is perform at the VMAS in front of millions of people. She's another one whose time is up.
Maybe she can hit up Madonna for another make-out session. I loved how the camera went to Justins face in the audience after that- it was priceless. And because the camera was there, the Christina-Madonna kiss didn't get focused on.