Billy Joel joins his tribute band on stage

Fans of Billy Joel were treated to a big surprise while watching his tribute band, Big Shot.
 
Billy Joel had been watching the set by the band when halfway through he decided  to get up on stage and perform with them.
 
They played 3 songs in total together. The Rolling Stones' Honky Tonk Women, Joe Cocker's With A Little Help From My Friends and his own You May Be Right.