He wasn't exactly Adam Sandler singing "I Wanna Grow Old With You" but Paul McCartney proved that he could be as good a wedding singer as anybody else.
The musical legend grabbed the microphone at his nephew's wedding on Long Island this weekend in front of 300 guests. Leading the 20-piece wedding band, McCartney sang The Beatles classic "I Saw Her Standing There" for the crowd and they loved every second of it.
What is the craziest surprise you've ever witnessed at a wedding. If you could have any ONE entertainer perform at your wedding, who would it be?