Citi Field overjoyed, singing Piano Man with Billy Joel at World Series (WATCH)Citi Field overjoyed, singing Piano Man with Billy Joel at World Series (WATCH)During the eighth inning of the Mets' 9-3 victory over the Royals, Billy Joel's "Piano Man" began blaring through Citi Field's speakers. And it was magic. Louis C. HochmanLouis C. Hochman