Paul McCartney has been on his "One on One" tour for years now, but he's still finding ways to surprise his audience. Those attending his first show at Nassau Coliseum in Uniondale, New York were treated to a cameo from Billy Joel.
The Long Island rocker joined Macca for "Get Back" and "Birthday." No word on who, if anyone, will join McCartney at his second show at Nassau Coliseum or at his final two shows of this leg of "One on One" in Detroit on October 1st and 2nd.
Check out fan shot footage of the performances below.