BOSTON — Sixteen-year-old Evgenia Medvedeva of Russia capped a dominant debut season by winning a world championship with a record-setting free skate score Saturday night.

Medvedeva earned 150.10 points to break Yuna Kim’s record from the 2010 Olympics. Medvedeva moved up from third after the short program to first as she added to her Grand Prix Final and European titles.

Told she had set a record, Medvedeva started giggling, then summed it up in English: “Wow.”

American Ashley Wagner skated last and sent the home crowd into a frenzy with a personal-best score that moved her from fourth to second, the first U.S. woman in a decade to win a medal at the world meet.

Another Russian teen, Anna Pogorilaya, won bronze.

American Gracie Gold, who led after the short program, fell on her opening triple-triple combination to drop to fourth.

Medvedeva looked a bit hesitant during Thursday’s short program in her first senior worlds. But she was captivating from the start Saturday. She landed seven triple jumps with never a hint of trouble, throwing an arm into the air on many of them.

“I won’t realize quickly I won today because one year ago I was still skating juniors,” she said through a translator.

It was a performance both youthful and mature. The program opened with Medvedeva peering out into the crowd with a look of wide-eyed wonder.

When it was over, she thrust both fists into the air.

“Actually I don’t really have any emotions right now. I left everything on the ice,” she said.

Sitting in the kiss-and-cry area, the teenager came back out. She bopped her head to the music as she waited for her scores, squeezing her eyes shut and clutching a stuffed animal tight as the marks were about to be announced.

She finished with a total of 223.86 points.

PAIRS: With dozens of Canadian flags waving in the stands, Meagan Duhamel soared high above the ice, held aloft by partner Eric Radford in the final risky element of their free skate. As she would say later, “I knew we had done enough” to win a second straight title.

Duhamel and Radford came from behind with a near-perfect performance to overtake Sui Wenjing and Han Cong of China, who were forced to settle for their second straight silver.

After the high of winning their first title last year, Duhamel and Radford struggled to find their focus for much of this season.

“It’s been frustration after frustration after frustration for us this season,” Duhamel said. “You work so hard, and that frustration – it hurts you so deeply. It just feels so good when it all comes together.”