Nastia Liukin (nastialiukin)

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Former world-class gymnast and gold Olympic medallist Liukin may have retired but she keeps winning on Snapchat.

Katrín Tanja Davíðsdóttir (Katrintanja)

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2015’s Fittest Woman on Earth is on Snapchat.

Her fans can keep up to date with her training as she looks to defend her Cross Fit Games title in 2016.