School janitor Richard Goodall sang Journey’s “Faithfully.”

“You are such an amazing man.

You’re so humble and so kind.

The ‘America’s Got Talent’ judges root for contestants

The ‘America’s Got Talent’ judges root for contestants.Trae Patton/NBC

You’re also a little bit quiet, but not when you are behind that microphone.

Then you’re abigrock star!”

She added later, I want you to win this so bad, Richard!"

Two seats over, Cowell approved of Goodall’s performance and he noted the crowd’s enthusiasm.

Trae Patton/NBC

“I could feel energy behind me,” Cowell said.

From the minute you came on this show, you’ve never crumbled.

And you know what?

We all need a hero right now, and you are our hero."

I think you just sang yourself one million dollars."

The show airs Tuesday, Sept. 24 at 9 p.m. ET/8 p.m. Central on NBC.

It will be preceded by a countdown to the finale at 8 p.m. ET/7 p.m. Central.