I didn't really care for the new arrangement (didn't seem to fit with the song) BUT she still did an amazing job. Even with the lyric flub. And she did look really good.
I do wonder HOW she will perform WDKY though? I know some of you guys mentioned her dancing

I know she did it WAY b4 when she first started, but I can't see her doing it now!!! I mean she said herself that she was a bad dancer. But I think shell need to do way more than just stand by the mix. I think that was one of my big problems with the AIEW era.