#TheDress #TheJacket, now #TheGirls: How many do you see in this pic?

Swiss photographer Tiziana Vergari, who took up Instagram’s #WHPidentity challenge of celebrating individuality, gave the internet its newest sensation – seemingly infinite number of girls in a photo frame.

It’s no chameleon dress that appears black and blue to some and white and gold to others, but the mirror illusion photograph has got social media checking their vision.

Swiss photographer Tiziana Vergari, who took up Instagram’s #WHPidentity challenge of celebrating individuality, gave the internet its newest sensation – seemingly infinite number of girls in a photo frame.

As Instagramers began sharing the image, people went crazy trying to count the number of real people captured in the photograph. In just a week, the photo has raked up more than 17,000 likes and 2000-odd comments.

Instagram issues weekend challenges to its user, and its latest #WHPEyeTricks on shooting optical illusions also threw up some fun images. Funnily enough, Vergari’s photograph is such a fitting contender for this week’s challenge. Here are a few of our favourites.