What do guys expect?

She's a perfectionist and she even admitted it. Vocally, it wasn't her best: it was really pitchy and her belts were really shrill (shouty), but hey we're getting a surprise and I'm (and to some/most of us are) excited for it!
But poor her because she really wanted to prove everyone that she is worthy of being a judge. I think the pressure got the best of her and gave us that performance.