It's funny, because I have my mixing headphones on right now from working on a song, and I clicked on your link and forgot how loud the volume was turned up from what I was previously listening too. Needless to say, that girl scared the crap out of me, literally.
She does have an awesome voice. Excellent control, and perfect pitch. I have always wished I could sing on that level, but I am not a good singer at all, that's why I sing rock music.