Actually, I'm not so sure bias against Crystal's looks have anything to do with her probable loss of the big win. If there were such a significant bias, she would never have made it to Top 2, which is the pinnacle of the AI contest. Crystal did a fine job last night with great vocals and great stage presence, and she will make a great album that a lot of people will buy.
I think the real mystery is not why Crystal only got to the Top 2, but why Lee is so popular with some viewers that he surpassed several much better singers this year in votes. He has a great voice, but he butchers songs with off-key singing, poor pacing and odd rhythmic choices. I had to cover my ears listening to him last night.