Two weeks into the season nine semifinals, a favorite has emerged on American Idol.

Sure, Casey James is handsome. And Lilly Scott is unique.

But, after this week's performance, Crystal Bowersox is the one to beat. Watch her wow the judges with a rendition of a classic single below:

[video url="http://www.tvfanatic.com/videos/crystal-bowersox-live/" title="Crystal Bowersox Live"] [/video]

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.