Hollywood Week on American Idol is notoriously difficult. Even nice Keith Urban says, "It's designed to be brutal." Wednesday's episode was lines, whittling the 190 contestants who got golden tickets down to 108. The next night was the group round, where the contestants break up into groups of three or four and stay up all night to nail the harmonies. The question becomes, "How badly do you want it?"

During the lines round, contestants come out in groups of 10 and sing a few bars each. It basically weeds out anyone who made it to Hollywood on a fluke audition.

Trent Harmon has mono
Twenty minutes before Trent Harmon went onstage, his doctor called to tell him he has mononucleosis. He should be home in bed, not trying to impress Jennifer Lopez with his voice. But he nailed it! In the group round, he had to perform by himself because he couldn't be around other people. But he crushed it again! Take some prednisone, Trent! It'll go away in about week!

Melanie Tierce made Keith Urban cry, still gets eliminated
Melanie Tierce had an incredible audition in San Francisco where the beauty of her performance made Keith cry and Harry leave the room because he couldn't handle how good it was. But she couldn't recapture the magic in Hollywood, and got sent home in a stunning upset.

The group round was rough, but some amazing stuff happened.

Team Blue Eyes comes out swinging
The first performance of the round was Team Blue Eyes - Kory Wheeler, Jenna Renae, Jordan Sasser and Kelsie Watts - and their remarkably confident performance of Bruno Mars' "Treasure" was so good that even their competitors had to admit they were impressed.

J. Lo gets emotional
While some talented ladies were performing Clean Bandit and Jess Glynne's "Rather Be," Jennifer Lopez got choked up when she realized that this was her last Hollywood Round. (Or is it?)

"While you guys were singing 'There's No Place I'd Rather Be,' I got very emotional because you reminded me how much I love this job, and how I'm really gonna miss Idol," she said.

"It's been a joy for me to sit here and watch this for so many years. Thank you."