Last night you saw the best in talent and the flaws of personality that I think each performer must overcome to win this competition.
Kathrine - She seems so robotic to me. Like someone took her into a labortory and made a singer kind of like Frankenstein. She is not natural enough for me.
With that said she was very good. She looked terrible, but sang wonderfully. Maybe in the lead right now.
Paris - Can a performer who sings and performs like a 20 year professional but carries herself and looks like a 12-year old school girl win American idol.
Paris was outstanding. She sang within her element. I agree with Randy, the thing that grabbed me about her in her audition was in full glory last night singing the blues.
Taylor - Can a grayhaired old soul from the Sixties win over a young demographic. Kelly clarkston, Ruben Studdard, Fantasia Barrino, Carrie Underwood and, and, TAYLOR HICKS!!! Sing it with me
"One of these things are not like the other, one of these things just don't belong" 
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Taylor's performance was part one and part two. part one was very low key and part two of the song was over the top. America has to decide which part they like best. If they choose part 2 he will be safe.
Ace - His looks does not match his talent. Hollywood looks and State Fair talent.
Ace was OK, but he seems to use gimmicks and props to carry him through. Like R and B'ing your way through a Standard. Or putting your hair in a bun. Or showing your scar.
Pickler -

She has a wonderful story, but you just can't get past the dumb blonde act. When she was talking with Rod Stewart last night and he said "Words and lyrics are the same" and she let out a big ole HUH!!! I was dying.
Kellie was not very good last night. Pitchy and her timing was off. She started out OK, but as the song went on, the worst she got. She did not help herself by saying "I butchered the song"
Elliott - Can his perceived "lack of personality" translate into cool and smoothness.
His performance was not memorable. In fact I am struggling to remember what he sang. Oh, yes "It Had to be You". The background singers which has been solid all season was annoying as heck. But Elliott was good enough to move on to next week.
Chris - Can he show that he is more than a one-dimentional, high speed rocker.
He kind of showed that last night. I don't think he was as good as the judges made him to be, but he did show another side of him that was solid.
Bottom Three Prediction - Ace, Pickler and Elliott
Eliminated Tonight - Should be Pickler, but I think Ace may have run his course. Ace.