The 'underboob' bikini trend returns to Australian beaches - but why is it so popular?

Last year it was the 'side boob' that was getting all of the attention and this summer Instagram is seeing a resurgence in the 'underboob' from Australian models and celebrities.

The 'underboob' bikini trend returns to Australian beaches - but

The 'underboob' bikini trend returns to Australian beaches - but

The 'underboob' bikini trend returns to Australian beaches - but

The 'underboob' bikini trend returns to Australian beaches - but

The 'underboob' bikini trend returns to Australian beaches - but

The 'underboob' bikini trend returns to Australian beaches - but

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ReThink Breast Cancer: Boobyball stunt • Ads of the World™

Welcome to my office. Where boobs hang out, crying happens (for

Look at these two boobs!