Choir! Choir! Choir!

Choir! Choir! Choir! is a Toronto music project founded in 2011 by Daveed Goldman and Nobu Adilman after an impromptu birthday singalong. The idea is simple: the audience is the choir. At each event the hosts teach the room an arrangement of a single song, then everyone performs it together. They have shared the stage with Patti Smith, Rufus Wainwright and Rick Astley, and their videos have drawn tens of millions of views.