Chantal Kreviazuk, the Canadian Grammy-award winning singer, changed the lyrics to O Canada at the 4 Nations Face-Off game against the United States on Thursday in response to repeated comments about absorbing Canada as a "51st state.

Canadian hockey fans began booing the American national anthem at Bell Centre in Montreal when Team USA played there on Saturday — sparking three fights to break out in the first nine seconds of the game, which the US won 3-1 with Canadian Prime Minister Trudeau in attendance.

Singer Chantal Kreviazuk changed the lyrics of the Canadian national anthem during the 4 Nations Face-Off championship game between the US and Canada on Thursday, adding further fuel to a contest already layered with political tension.

The routine friendly bet between leaders of Canada and the United States before hockey games was replaced by taunts and heightened stakes on Thursday.

Canadian Prime Minister Justin Trudeau basked in the geopolitical thrill of victory Thursday night, celebrating Canada’s 3-2 overtime win over team USA in the 4 Nations Face-Off final with a jab at President Donald Trump.