I honestly have no idea what you're talking about.
I'm watching the TV version right now, it's bad quality and her vocals are still good. Ladies Night is a hard song to perform and I thought she aced the chorus, maybe not the verses, but even so, rapping is hard.
Your standards for a grieving woman seem way too high.
I'm just into the second hour of the concert by the way and it's fantastic so far. I've already seen the TV performance of untitled ~for her~ and that was fantastic too. :S
I seriously have no idea why everyone is saying the vocals are bad... "/