We’ve seen the ‘thigh gap challenge’ and the ‘coke can challenge’, now comes the newest hashtag to sweep the internet and make us feel inadequate all over again.

The #UnderboobChallenge is, apparently, to prove you are a true woman, but we’re pretty sure true women can achieve a lot more than just holding a pen under their boob/s.

Anyway, here’s how it’s done below, if you weren’t already sure… however, make sure to scroll down to the bottom to see our favourite.

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And the winner is!…

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