The only thing I'll give her is she can actually sing very well. When she isn't trying to be as weird as possible she's actually pretty good, like her stuff with Tony Bennett.
But yeah...WTF. Part of the problem is with bands the music mostly is pre-recorded, and only the vocals are live. When the RHCP played during Bruno Mars' halftime a few years ago, they all pretended like they were playing, and they even made fun of it after the fact. So that automaticlly disqualifies probably pretty much every act I would like.