Guess how many girls are there in this photo

A Swiss photographer Tiziana Vergari recently posted a picture that went viral all over the Internet. This picture has left many confused and no one can guess the correct answer. Get ready to scratch your head and let us know your answer.

All you have to do is figure out how many girls are actually in this picture.

The picture was sent as an entry for Instagram's Weekend Hashtag Project - #WHPidentity. The main aim of the project is to celebrate individuality through photos and videos being submitted by the participants.

The photo has got over 12,900 likes and has been shared by many users. Most of the people have come up with answers like 2,3 and 4, what's your guess?

(Photo: Screen grab)

(Photo: Screen grab)

(Photo: Screen grab)

So what do you think? How many girls are actually in this picture?