LOL! I heard that when it happened. I think the problem is that Hillary's voice wasn't in the range that the song began in. Still, it's pretty funny.
Unless the music to a song is in screech range, I don't think it would be in Hillary's voice range.
I did notice, as did others on the other thread, that she sang "oh, say does OUR star spangled banner yet wave". I believe the word, as written, is THAT.