A former Olympic gymnastics star has clarified a video posted on her Instagram account, where she dances in her underwear, was not a hack.

McKayla Maroney was one of the stars of the London Olympics after claiming gold in the team event and silver in the vault.
An image of her silver medal reaction on the medal podium went viral with the 'McKayla is not impressed' meme becoming a popular social media image.

Maroney didn't compete at the 2016 Olympics in Rio, last year stating she was concentrating on a music career which has yet to take off.

The 21-year-old has defended the video she posted on her Instagram account where she's wearing a tank top and a black - which was sent to her 1.2 million followers.

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Maroney tweeted: "Hey, im just doing me. if u want me to be a role model so bad, get inspired by how i give 0 f***s and go do u."
"Not everyone's gona like u, but if u stay true to yourself they might just respect you "

It's not the first time Maroney has dealt with controversy since London. Nude pictures, which she claimed were fake, were leaked on the internet, along with those belonging to dozens of other celebrities. And last year, Instagram followers are accused her of getting lip injections, which she denied.

"Growing up in the social media world, it's tough," Maroney said in an interview with Seventeen.

"Your face changes, you get older, your face fills out, and you fall into liking makeup and different stuff like that. And for people saying that, for the most part - it would kind of hurt my feelings when you haven't done anything."

"I was a gymnast my whole life. I mean, I'd go to Starbucks and people would be like, 'Are you going to the next Olympics?'" Maroney told the magazine.

"And when I'd say no, they'd literally look sad. So it was very hard for me to get excited about anything else. I thought that I had to do gymnastics forever. To be excited about this new piece of myself and this new part of my life is very special for me. ... Even my bio on Instagram is like, 'That girl that fell at the Olympics.' Just as a joke. Because that's how people come up to me and that's what they say. That's how they remember me."

- With news.com.au