I have to agree with your top three.
Far and away, Chris? (Walk the line singer) blew me away. I love Johnny Cash, and when I heard he was redoing it, I almost changed the channel, but wow, I thought it was great!!! I really don't like remixes generally, but I would actually pay for a copy of this one. Mandisa followed up as number 2 for me, and I am a little unsure of number 3. I do know that I really liked the nerdy kid, but I can see most posters here don't feel the same.
Normally, Kevin (the nerdy kid LOL!) stinks to high heaven, but he wasn't that bad tonight. I'm sure he'll be sticking around for at least another week.
So would I!