American Lindsey Vonn completed a hat-trick of Alpine Ski Women's World Cup triumphs at Lake Louise on Sunday, winning a Super-G to claim her 45th career victory and extend her points lead. Vonn followed up back-to-back downhill victories on Friday and Saturday on the Canadian piste by completing the 1,973-meter, 36-turn course in 1min, 20.21 secs, defeating Anna Fenninger of Austria by .19 of a second. Another American, Julia Mancuso, was third in 1:20.92. In sunny and cold conditions on one of her favourite layouts, Vonn won for the 11th time in her career at Lake Louise, nine of those coming in downhills. "I wanted to get off to a great start this season," Vonn said. "So far things are going really well. I'm extremely happy." US alpine speed queen Vonn has won all three races since announcing she is to divorce her husband and coach, Thomas Vonn, after four years of marriage. Vonn, 27, leaped into the overall World Cup lead on Saturday and boosted her pace-setting total to 422 points. Vonn's Super-G triumph was her fourth of the season, the first coming in a giant slalom in October at Soelder, Austria, that made her only the fifth woman to win all five Alpine ski disciplines in World Cup competition. She then won Friday's Lake Louise downhill in 1:53.19, 1.95 seconds in front of runner-up Tina Weirather of Liechtenstein, and took Saturday's downhill in 1:51.35 with France's Marie Marchard-Arvier second in 1:53.03. Vonn's hat-trick makes her the first woman to win 11 times at the same World Cup venue, surpassing the domination mark she matched Saturday that was set by Austrian Renate Goetschl, whose 10 triumphs came at Cortina d'Ampezzo