MUST SEE: Mic goes out during U.S. National Anthem at hockey game, so Canadian fans step up

TORONTO -- A heartwarming video of Candian hockey fans helping finish the U.S. National Anthem is going viral.

During a Toronto Maple Leafs game Tuesday night, the mic cut out as singer Michelle Madeira was partway through the Star-Spangled Banner.  But rather than stop in the middle of the song that means so much to fans south of the border, the crowd joined the mic-less singer and finished the anthem.

Watch the video above.