[Wildcat!]

Oh please. So many pop star mime, especially if they dance a lot (Britney, Jlo, Janet etc...). Its not new, its not surprising, its normal. I would be more shocked if she came and sang straight. I dont know why people are all outraged.
Plus when you are promoting a single, you want people to hear it as close to studio as possible, at least for the first time, so they know if they want to buy it or not, just like they did with the Hero single in last years Xfactor.