Watch Shawn Mendes Inject Some Whimsy Into 'Treat You Better' With Jimmy Fallon

Raspy voice, meet classroom instruments

BTS Sing And Dance Their Way Into Jimmy Fallon's Heart (But He Only Has Eyes For Jimin)

Chimmy Fallon gets an education in Bangtan, from finger hearts to fanchants, on 'The Tonight Show'

Justin Bieber Dons A Fake Mustache To Dance With Strangers In Central Park

With some help from Jimmy Fallon, naturally