Olympic moguls medal favourite Jakara Anthony has surrendered her overall World Cup lead despite another fighting top-five finish in Canada overnight.
The 23-year-old freestyle skier finished fifth, but a podium-topping performance by Anri Kawamura saw the Japanese teenager take the overall lead from the Australian after four rounds.
It was the 17-year-old's second World Cup triumph this season while Anthony won their last outing in France.
Anthony is looking to advance to the Olympic podium in Beijing in February after finishing fourth at the Pyeongchang Games in 2018.
Fellow Australian Sophie Ash finished 13th in Tremblant in her best result while Britt Cox was 17th.
In the men's event, youngster Cooper Woods locked in his first Olympic berth after finishing ninth - the best of the Australians.
Brodie Summers, who is ranked eighth overall, finished 21st.
Canadian ace Mikael Kingsbury clinched his home event ahead of Sweden's Walter Wallberg while World Cup leader Ikuma Horoshima of Japan was third.
Pyeongchang silver medallist Matt Graham is back in Australia recovering from a snapped collarbone but is still hopeful of making it to the Beijing Games, which open on February 4.