St. Catharines native Caileigh Tiller scored the game winner as Canada captured the gold medal at the world women's under-18 hockey championship.
Tiller opened the scoring on the power play as Canada beat the United States 3-0 in Vantaa Finland.
Marilou Grenier stopped 14 shots for the shutout.
Dorothy Copetti and Stryker Zablocki had third-period goals to cement the Canadian win.
Canada outshot the U.S. 30-14, including by a 14-5 margin in the second.
Sydney Sawyer added two assists for the Canadians.
Czechia defeated Sweden 2-1 in the bronze medal contest.