I'm surprised no one mentioned Simon's blown out of proportion middle finger incident.
Amy's "I'm not mad, I'm just hungry." comment.
The girl who said she didn't sound that good because her panty-hose were too big, and Simon said something like "Oh, in that case, you're through to Hollywood."
Russian Sergey's version of english "I'm Too Sexy" in a french accent.
After three bad Hollywood auditions, Michael Keowyn's bitter complaint that since Simon said his initial audition of "Unchained Melody" was the best he'd ever heard, he should get a free ticket to the top thirty-two. :rolleyes
People like Kara Master, Jonah Moananu, the Roman brothers, Lisa Wilson, and Heather Piccinini making it over people like Nicole Tieri, Sarah Logan, and Sarah Silva.
The first all female final four in Idol history.
Cassie LeBeau's complaint that she couldn't remember her lyrics because of the stagelights, so the judges had the lights turned off, and she didn't regain her memory.