Grace VanderWaal, a 12-year-old musical prodigy, took the America's Got Talent judges by storm on Tuesday's night episode with an original performance. A native New Yorker, Vanderwaal, without a hint of hesitation, she plunged into a song she wrote titled “I Don’t Know My Name,” playing along with her ukulele. The song ended with a standing ovation, followed by immediate praise from judge Howie Mandel—who called her “a miracle” before hitting the elusive “golden buzzer” that sends her straight to the live show.