Watch Grace VanderWaal Sing One Last Original Song In The 'America's Got Talent' Finale

The 12-year-old has taken the country by storm.

Take note of new music and the best live performances here:
Take note of new music and the best live performances here:

12-Year-Old Grace VanderWaal has wowed us all summer with her honest original songs, charming ukulele skills, and distinctive voice.

On Tuesday night, Grace performed on the America's Got Talent stage one final time before this season's winner is announced on tonight's show. She's long been a clear frontrunner, and this latest performance only cemented that. 

Before Grace took the stage, the show proved just how much the public has embraced her by featuring various YouTube covers of her audition song, "I Don't Know My Name." Grace shared her amazement that a song she wrote in her bedroom is now being sung by people around the world.

"Tonight I'm gonna be singing words that came from my heart," she said. 

The song is called "Clay," and it speaks to overcoming bullies. "'Cause your punches and your names / All your jokes and stupid games / They don't work / They don't hurt," she sings. "Watch them just go right through me / Because they mean nothing to me."

She vows not to let cruel people get to her, repeating, "Try to change my shape / But, baby, I'm not clay."

The judges were, unsurprisingly, very impressed. Howie Mandel, who hit the Golden Buzzer for her at the start of the season, called her "Amazing Grace" and said she "has to win."

Watch Grace's performance below, and tune in to NBC tonight to see what happens.