Brita Sigourney of the United States won the bronze medal with a score of 91.6 points.
Sharpe, who was ranked in the first rank of the qualifications, has continued his domination to achieve a first olympic gold medal in career, and a seventh for Canada at these olympic Games.
Sigourney was joined in the final by US teammates Maddie Bowman and Annalisa Drew.
There was only love for Sigourney afterwards from Drew and Maddie Bowman, the 2014 Olympic gold medalist who fell off the final turn in all three of her finals runs to finish 11th.
Devin Logan, the first USA freestyle skier to qualify for both halfpipe and slopestyle at the Olympics, did not make the final and finished 15th.
She showed that Olympic pressure hadn't changed that during qualifying the day before, when she soared high over the field, setting the tone for the entire competition.
"When you got your hard-as-nails coach in tears at the top, it's kind of hard to zone into what you're doing", she said of that run.
The dining hall of Santa Catalina School was packed with more than 150 students and faculty Monday night to watch one of their own, Brita Sigourney, compete in the 2018 Olympics in the women's freestyle halfpipe skiing.
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Day 12 of the Olympics will feature multiple Americans with a chance to medal, including alpine skiing star Lindsey Vonn.
"At the point, I'm like, "oh my God stop hugging me" because I'm going to cry and I need to focus and reel into this", she said. It was there she realized her passion - and talent - was in skiing. She celebrated her second Olympic medal with her 8-year-old daughter.
Just before she drops into the pipe, she arms herself with her go-to song, fist-bumps with her coach and repeats her motto: "Just do what you've already done".
"I just feel to proud and honored to are a part of this group of girls", she said.
There are three American teams in medal contention, including reigning national champions Madison Hubbell and Zachary Donohue, who were third after the short dance.
Logan watched the women's final, and noted, "the amplitude, the tricks, the difficulty of everything, there was talk a while ago how women's skiing wasn't progressing".
Sharpe topped qualifying Monday with a pair of massive runs and went even higher in the finals. "It' just so touching and it makes you feel so much better when your teammates are there to back your success".
"She blew it away on her second run", said Sharpe. "She's worked so hard for this and has wanted it so bad". She said Bowman's success inspired her, and her desire really took hold of her before that final run.