Grace Vanderwaal, 12, Breaks into Sobs as She's Crowned Champion of America's Got Talent

Trae Patton / NBC. During the show, she performed her viral audition song "I Don't Know My Name" to a packed audience, including special guest Stevie Nicks, who Grace got to later introduced before the Fleetwood Mac band member performed "Landslide." #StevieNicks