Vonn also leads the overall World Cup standings
Lindsey Vonn won the women's World Cup super-G title with victory on the slopes of St Moritz in Switzerland.
The American fended off Austrian Andrea Fischbacher and France's Marie Marchand-Arvier to take an unassailable lead with two races remaining.
Vonn's nearest super-G title rival, Swiss Fabienne Suter, finished fourth.
The win consolidates Vonn's overall World Cup lead before she competes in the Winter Olympics, which begin in Vancouver on 12 February.
Germany's Maria Riesch, who had closed the gap on Vonn with victory in Saturday's downhill, could only manage 11th after hitting a gate.
Riesch now trails her friend and rival Vonn by 137 points in the overall World Cup standings.
Marchand-Arvier produced her best World Cup result by coming joint-second in the same time as Fischbacher - 0.17 seconds slower than Vonn, who clocked one minute 1.77 seconds.
Britain's Chemmy Alcott, meanwhile, placed 19th in a time of 1:02.85.
Vonn will continue her bid for a third successive overall World Cup crown, when the circuit resumes after the Vancouver Games at Crans Montana in Switzerland on 5 March.