This optical illusion is baffling the internet

2016 was the year of celebrity deaths and internet optical illusions. Well, brace yourselves celebrities, because this year seems to be following suit, as we have our first viral optical illusion of the year.

The latest illusion has seen the internet puzzling over this image of a girl...

Because she quite clearly has three legs.

Some commenters on Imgur speculated about what was going on:

"She's just attached a false leg to her regular leg, or asked a surgeon for an extra leg" one user guessed.

"She's sitting on a brown pillow" another guessed.

“Still don’t know what is happening” one person gave up.

If you spend a little while longer staring at the image and shouting at your brain for being a moron, you can eventually make out that it's a normal bog-standard two legged human holding a vase. You'll then be unable to see her in her three-legged form once you know what's going on.

If you still can't figure it out, here's an image someone circled, so your mind doesn't melt whilst you try to figure it out.