Courtney Hadwin is a 13-year-old girl who showed an amazing performance in America's Got Talent recently. The video is available on YouTube: [Courtney Hadwin: 13-Year-Old Golden Buzzer Winning Performance - America's Got Talent 2018][1]

I am by no means an expert but in a few moments it seemed like she was forcing her voice ([vocal folds][2]) too much, seeming that she wouldn't be able to keep singing like that for more than a few minutes.

I am specifically thinking about what she does with her voice when:

* She says the word "afraid" (at about 1:54)
* At the last scream when she gets on her knees (at about 2:21)

Is there a name for this kind of sound?

Does that hurt the vocal folds or was it be done in a way that does not "damage the voice"?

  [1]: https://www.youtube.com/watch?v=gPHVLxm8U-0
  [2]: https://en.wikipedia.org/wiki/Vocal_folds