Billy Joel is in the middle of an epic run of shows at New York's Madison Square Garden. 

During the run of shows, Billy has had some cool guests - like Paul Simon and Miley Cyrus - But at his 100th (!) show on July 18, 2018 -  Billy Joel brought along a pretty amazing guest to the storied arena- Bruce Springsteen!

Check out the BOSS and the PIANO MAN belting out versions of Tenth Avenue Freeze Out and Born to Run below!