Not surprised the only bad comments about the performance is by monsters. I mean, if you don't like Katy, I don't see the reason to see her performing.
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Her voice is so good here, it sounds like the best performance of Roar.
when Katy performed there years ago she mistook him as the "microphone man" when he really was a famous celebrity in Germany.. hence he joked about "Katy Perry and the microphone man!"
Glad she didn't do that boxing thing though 
