A film, despite not previously having been a musical, ends with a Crowd Song (possibly a traditional musical number, more likely lip-synced to an existing recording) involving a significant portion of the cast without regard for the previous relationships (or even physical locations) of the characters involved. American examples are possibly derived from the straightforward (over)use of this trope in Euro cinema. Frequently overlaps with Dance Party Ending. Probably related to Big Lipped Alligator Moment and to Gainax Ending. Contrast with Dancing Is Serious Business.