Watch: Oilers fans sing 'Star-Spangled Banner' after apparent mic issue

This doesn't happen very often.

Fans in Edmonton belted out the American national anthem Sunday night before Game 3 between the Oilers and the Anaheim Ducks after being prompted by Canadian country artist Brett Kissel, who appeared to have some difficulty with his microphone.

The audio seemed fine after Kissel strummed the opening chord and sung the first note, but things got a bit awkward before he seemingly improvised by coaxing the crowd into carrying the tune.

It might have been forced by technical difficulties, but it was still a classy gesture from Oilers fans that was surely appreciated by Americans and Kissel alike.