Sorry for resurrecting such an old thread, but I found it so intriguing - I had to reply!
Now clearly, as you can probably tell from my signature and avatar, you can see that my biased favorite is Katelyn Tarver. Now I know I am disappointing all Katelyn Tarver fans and her family and friends, etc, by saying truthfully that I first liked Katelyn because she's "obviously beautiful". Yeah, I kinda have that superficial soft spot for those attractive types. BUT I must say that the last two songs she has performed (Tell Him and On the Radio) I think she has surprised many who have held Katelyn only in the back of their minds as someone with talent. I truly think she has good singing talent, but like she even admitted in the audition video, she doesn't have much experience. But for a person with (it seems) the least amount of experience, she seems the best natural performer.
Note: The above opinion is absolutely and purely my completely, never-faltering, and shameless BIASED opinion