Are these legs shiny or legs with white paint on them?

Remember the white and gold dress that divided the internet? Or was it black and blue?

Well never mind that conundrum, here is another optical illusion that has got social media all fired up.

This time it's all over a pair of legs. So far, the picture has been shared almost 18,000 times on Twitter and left a lot of people confused.

And the question that demands an answer - are they shiny or are they just legs with white paint on them?

This tweet set Twitter into a meltdown

Some people can't help but see shiny legs.

Raina Tweeted that the picture "literally looks like she slathered on baby oil..where the paint at??"

But others pointed out that actually, the legs do just have white paint on them.

This person Tweeted they had to get help to see the paint

And once some people saw the white paint they couldn't see the shiny legs any more.

Twitter is full of confused people

This person wished they could see shiny legs again

Most people soon came to their senses and saw white paint

Some people don't even think it's paint.

This guy Tweeted he thought it was toothpaste.

The shiny legs question follows the great dress debate last year.

But now, we can't remember what colour it's meant to be.

Find us on Instagram at BBCNewsbeat and follow us on Snapchat, search for bbc_newsbeat