In reply to Saetana.

Yes, I was surprised that Gaga did have clearer tone and vocals, and her performance blew even Mick away. I noticed that at one point, Mick was looking around for Gaga, and Keith Richards looked up from his guitar and Charlie Watts from his drums when she was moving around the stage as she is THAT entertaining and brilliant a performer. All the Stones members then smiled and she even got a reaction out of Keith Richards, which is very difficult to do as he is half-dead (albeit totally awesome).

You can see her interact with all the Stones, the back-up singers and the audience. That is the mark of a great performer!