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Internet debate alert: How many girls are in this photo?

Maeve McDermott
USATODAY

Not to ruin your day, but here's another optical illusion to tear your life apart.

It's been a little over a year since #TheDress overloaded your newsfeed. An Instagram post by Swiss photographer Tiziana Vergari is a similarly-infuriating optical illusion that's starting to trend.

This time, the dresses are definitely grey—it's the number of girls in the photo that's up for debate, their likenesses reflected in a series of mirrors that go on and on.

The question: are there two girls, or are there four?

Have fun stressing out over this one for the next few hours.

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