Billy Joel fans got the double-act of a lifetime after Jon Bon Jovi joined the Piano Man on stage at New York’s Madison Square Garden at the weekend.

Video surfaced of the unannounced guest appearance, where Jon Bon belted out “It’s Still Rock and Roll to Me” and “Big Shot” with the great man.

Billy Joel has just marked his seventh year performing his monthly residency at the venue, which kicked off on January 27, 2014.