I think Lee has been a favorite of the judges based on what they've said about him, and that's why they gave him "Hallelujah," which is a song that I love basically no matter who sings it, as opposed to Crystal's assigned piece, which was good but not as popular on its own.
I'm still rooting for Crystal, as she seems to have more confidence all along, and knows who she is as an artist, which I am not sure Lee does.