AGT Winner Grace VanderWaal Has 'Freak Out' Moment at Z100's Jingle Ball 2016!

Grace VanderWaal had the most amazing moment at Z100′s 2016 Jingle Ball in NYC last night!

The America’s Got Talent reigning champ had a little freakout on stage during her surprise performance, when the audience starting singing her song, “I Don’t Know My Name” back to her!

PHOTOS: Check out the latest pics of Grace VanderWaal

“Such an honor to introduce @elliegoulding and perform at the #iHeartJingleBall tonight!!” Grace wrote on her Twitter afterwards, and even shared a pic with Sabrina Carpenter!

Watch Grace‘s freakout moment below!

Check out more pics of Grace VanderWaal inside!