The Zac Brown Band played historic Fenway Park in Boston this past weekend with two shows, both Friday and Saturday night.  But Billy Joel fans were recipients of a big Zac Brown musical surprise Thursday night as well!

As it happens, Joel played Thursday night, prior to ZBB and the famed Piano Man brought the crowd to their feet when he introduced Zac Brown during his encore.  "I'm playing one night at Fenway Park, but this guy is playing two," Joel crowed. The Brown joined him on stage to sing “You May Be Right.”

The Zac Brown Band played the following two nights to a jam-packed facility, which isn't a shock considering the shows sold out instantly within minutes of being announced this spring.  The band was scheduled for one performance originally, but when the first show was announced the reaction was so strong a second concert was added and also sold out quickly as well.  So catch 'em when you can - the Zac Brown Band's "Great American Road Trip Tour" continues through August 15th. Click here to see...Zac Brown At Fenway.