At first glance, the photo shows a group of friends posing on a sofa with drinks, but on closer inspection, there is something very confusing about it.
The young woman in the middle of the picture appears to have no legs.
The picture, thought to have been taken in the US, seemingly shows six friends relaxing on the sofa, but just five pairs of limbs. It baffled the internet.
However most believe that it's a remarkable optical illusion, with the sixth pair of limbs hidden behind another woman's legs.
The puzzling photo was posted on Reddit by user 'jr0d7771' on Christmas Eve, captioned: "Find the middle girl's legs." It has since been commented on a whopping 400 times, with one person writing: "The second girls legs are behind first girls legs. I think."
Another user remarked: "I think so too," while a third said: "I actually think the first girl has get legs draped OVER the second girls legs (sic)."