Here is the list we'll call the "Congratulations Christina and Sam" montage:
The Marvelettes sing Going to the Chapel.
Luke and Laura get married on All My Children and live happily ever after. Just kidding, it was a soap opera.
Billy Idol pumps his fist to White Wedding.
Miss Piggy and Kermit come *this close* to marrying.
The Fifth Dimension and Wedding Bell Blues.
Steve Martin panics in the remake of the Father of the Bride.
Fred Astaire dances on the ceiling in Royal Wedding.
The ending of Four Weddings and a Funeral with Andie McDowell and Hugh Grant.
Sarah Harmer sings Open Window (the Wedding Song). Best song with wedding in the title, by the way.
Apologies to: Peter, Paul and Mary, Sex and the City (first movie), Wedding Crashers, Buddy Holly, and about one million other movies and songs. Maybe next time.