Chris Daughtry does Creed's "What If." And OK, this is what I meant when I worried I might not know the music tonight. But no one said he's supposed to be picking songs with me in mind.

So was it only a week ago that Simon was praising Chris for his refusal to compromise?

Apparently he's now crossed some imaginary line and is going to have to start acting like an "American Idol," pronto.

Or, OK, it could just be Simon's mood swings.

Katharine McPhee sings "The Voice Within" and Paula thinks Christina Aguilera would feel honored.

Let's call and ask her, OK?