Nikki, wearing a bright pink sundress, was strapped into a harness as she flew across Stadium Australia - making her an overnight household name.
After her success at the Olympics, Nikki signed a contract with BMG and her hit song Strawberry Kisses - which has remained popular to this day - reached No. 2 on the Australian singles charts in 2001.
Nikki went on to create her own clothing range in collaboration with Kmart. The 'Nikki Webster' clothing and accessories range for girls aged between 5–10 was first released in stores in 2003 and was an instant hit with customers.
Matt proposed to the former child star on a romantic holiday to Fiji in 2010 after two-and-a-half years of dating.
After revealing their plans to wed, Nikki, now 34, told Woman's Day at the time: "I can't wait to spend the rest of our lives together".
On their wedding day, Matt, 41, gave Nikki the fairytale entrance she'd dreamed of since she was a little girl, surprising the Strawberry Kisses singer with her very own horse and carriage.
"I thought it would be a lovely gesture, especially since her grandparents came all the way from the UK for the wedding. I looked at a few and picked the one that most looked like a princess carriage."
The couple welcomed daughter Skylah, now six, in 2014. A little brother for Skylah arrived in 2017, with Nikki confirming the birth of Malachi during an appearance on Sunrise.
Although she gushes about Skylah and Malachi when given the chance, Nikki has kept their upbringing relatively low-key, only sharing a handful of snaps on social media and taking part in the occasional photoshoot over the years.
In the months that followed, she and Matt were photographed outside Nikki's dance studio doing what appeared to be a handover of their kids.
In 2019, Nikki appeared as a contestant on The Masked Singer Australia as Alien, but was booted off in the third episode.
Nikki proved to fans she still had her iconic singing voice, and gained praise from viewers for her performances.
“I was flattered that people still thought I was distinct and could remember me,” Nikki told TV WEEK at the time.
“For me, that was better than staying under wraps or being incognito. People still remember what I sound like and that’s awesome.”
The mother-of-two now runs three successful dance studios which she founded in 2010 at the age of just 22.
Dance Nikki Webster academy is located in Sydney's Leichardt, Minchinbury, and Erina on the NSW Central Coast.
In September last year, Nikki teased she will be releasing new music for fans in the not-too-distant future.
Speaking to Nova's The Babble, Nikki said: "I have recorded music, I've recorded a whole album that I love and it's great fun, but I just haven't released it yet."