And that one finger must block your bottom bits and your top bits! It's tougher than you think.
The idea is to use one finger to block your naughty bits while taking a selfie in the mirror.
Luckily for us, there are tutorials now on Youtube to show the ladies how to do it.
And to think, we thought there wouldn't be anything fun to find on Monday!
Unfortunately, some dudes are getting involved in the trend too. Please don't ruin this, fellas.
So what do you think, did she get a boob job? Either way, we had a lot of fun looking.