100+ Jimmy Fallon, J.K. Simmons, and Billy Joel Spontaneously Break Into Song on ‘The Tonight Show’ – Closer Weekly

Jimmy Fallon, J.K. Simmons, and Billy Joel Spontaneously Break Into Song on ‘The Tonight Show’ – Closer Weekly

WATCH: Jimmy Fallon, J.K. Simmons, and Billy Joel Spontaneously Break Into Song on ‘The Tonight Show’