Katy was so amazing! When the whole performance came through on YouTube I watched it twice and could have started again.
She looked so beautiful and sexy; some people seemed to be disappointed at her not wearing the fairy like dresses she used to do but she is going through a different thing right now, and she's doing it so well!
I didn't even know in which fantastic shape she is physically, the choreography she did was practically a workout in the gym ending with skipping the rope during a song! After that last bit I wouldn't sing a note, but Katy can do those things like it was everybody's daily thing.
I was also surprised at Dark Horse - for me, it worked a lot better on a stage, listening to it from the iTunes track felt awkward to me for a long time but through this concert I suddenly understood how it's supposed to be like! I didn't notice that Katy was out of breath at any time, but even if she has been, well, I wouldn't be surprised, and then she coped with it extremely well!
Even just staring at an iPad this performance was such an experience to me, it's as if I became even more aware what an incredible woman Katy is!