Thumbs up to Jimmy Fallon for being such a big, enthusiastic, supporter of Broadway! He invited Tony winner Chuck Cooper, Tony nominee Josh Young and the cast of Amazing Grace on The Tonight Show on August 18 to sing a number from the new tuner. Fallon's verdict after he heard the sweet sound of the company after they belted out the show's titular song? "Fantastic!" Check out the moving performance below and then the musical, currently playing on the Great White Way at the Nederlander Theatre.