Not really. And that's barelyy a high note. Maybe she hits a middle C. Not much higher than that. Its just the way her voice resonates that makes it sound high.
But I also say not really because her voice has always been like this. She is usually singing so autotuned that you don't know who u listenin to.
But she lowered the key for this performance because her studio version is higher
This chick's 'routine' before a concert is to suck a cough drop and smoke a cig because it makes her voice 'raspy'.
If anything she is declining a tad. But she makes up for it by the physical aspect of entertaining
This is coming from a vocal major btw