With his ailing brother looking on from the front row, David Cook turned Mariah Carey night into a personal celebration last night. Perhaps even a coronation.

After delivering an incredible version of "Always Be My Baby," Cook soaked up the cheers, which included a rare standing ovation from Randy Jackson. As Ryan Seacrest then pointed out, the talented finalist had tears in his eyes - and who could blame him?

David's brother, Adam, was in attendance for the first time all season. Adam is currently undergoing treatment for brain cancer.

During a commercial break, David walked down to hug his brother in his seat. All three judges did the same.

"His brother came to town a few days ago, and he's not in the best of shape and you can tell it's affecting David and everything," says dancer Lacey Schwimmer, of So You Think You Can Dance, who has stepped out with David recently. "But I think it's a good thing that he's here because it shows that his brother is still supporting him."

Our thoughts, prayers - and congratulations on an amazing performance - go out to the Cook family.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.