I missed most of it due to the bizarre Celtics/ Cavs game.
They announced that David C. was doing Baba O'Reilly, and I thought "this could be one of the great Idol performances." Sadly, that arrangement sucked. It was probably the biggest Idol-edit travesty since Innuendo. I wish they'd let these kids sing a whole song (or at least a 4-minute rendition of one) when they get down to the final few.
Then Castro comes on to sing Mr. Tambourine Man, and I thought "PLEASE GOD, let him do the Shatner version!" To my surprise, he sounded OK. But only for 15 seconds, until he forgot the words.
When David A. said he was going to sing Love Me Tender, I thought "Hm, should I point the gun at my left temple or my right temple?"
When Syesha came out, I thought -- well, I won't repeat it, but y'all can guess.

She was kinda shouty though.