According to Bombard the body language gal, she just scrunched her neck down to put pressure on the vocal cords, it’s something that can be learned by anyone. The proof is that she spoke with that croaky almost-broken voice, yet there was no mucus, never uses a kleenex, never coughed or cleared her throat. Totally faked.
I'm not the sharpest tool in the shed but Ieven I could see she wss performing.