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But Douglas did her one better. She brimmed with confidence as she whipped off a series of back handsprings, landing as easily as she had during practice. She knocked out a front somersault with such power the thud of her landing echoed throughout the O2 Arena.

She took a small hop forward on her dismount, but it hardly mattered. The look on her face said it all: Yeah, I got this.

“She demonstrated she is an Olympic champion,” Chow said. “She dealt with a tough job and I think she did very well.”

Her score of 15.5 extended her lead over Komova to more than three-tenths of a point going into the final rotation, floor exercise.

And so the gold came down to the two of them after 2010 world champion Aliya Mustafina and American Aly Raisman fell out of the running after errors on balance beam.

Though Chow told Douglas not to look at the scoreboard, she admitted she couldn’t resist. A few times.

“After vault,” she said. “And bars. And beam. And floor.”

“She’s not a good listener,” Chow chimed in, smiling.

Turns out knowing where she stood didn’t hurt her performance.

Douglas gets more air on her tumbling passes than the NBA’s Carmelo Anthony, whom she and her teammates met the other day, and she lands them without a wobble. Unlike most gymnasts, who may as well use elevator music it matter so little, her “We Speak No Americano” is as big a part of her routine as any trick. Every pass is landed on a beat of the peppy techno music, and don’t be surprised if kids at the clubs rip off her dance moves.

She had the crowd clapping — even the hard-to-please Karolyi was moving and grooving — and she threw the judges more than one playful grin.

“I love this routine,” she said. “I can express myself.”

Her score of 15.033 meant Komova needed a 15.36 or better to win. When she didn’t come close, Douglasgrabbed herself another gold.

The move, sacrifices, doubts, tears — all of it — had been worth it.

“I don’t ever recall anybody this quickly rising from an average good gymnast to a fantastic one,” Karolyi said. “She’s just so much a nice girl and so hardworking and dedicated. … She just loves gymnastics and she really loves to be on the top.”