Grace VanderWaal and Jimmy Sing with Their Mouths Full

Also available on the NBC app

Jimmy and America's Got Talent winner Grace VanderWaal take turns stuffing their mouths full of marshmallows and trying to guess as many songs the other is trying to sing as they can in 30 seconds.

Available until 10/24/18
Appearing:Jimmy Fallon
Tags: The Tonight Show, Jimmy Fallon, grace vanderwaal, Jimmy, Sing, Mouths Full
S4 E53 minHighlightTalk and InterviewLatenight