>>105881167
Oh, she's not.
That's the same effect that was used in the original song. It was supposed to be robotic.
https://www.youtube.com/watch?v=lg_FoEy8T_A
As far as I can tell, she didn't use autotune at all in the concert, and any time it has the echoey effect, it's replicating something from the original song (like a crowd chanting)