1D fans, you might have already seen this video, but it's definitely worth re-watching anyway.

There are lots of parodies of their hit “What Makes You Beautiful”, and now they’ve done their own version. Here’s their math song.

The video is from back in October, so you might have already seen it. But it was so funny that we decided to post it anyway. Even if you’ve already seen it, it’s hard not to laugh at the ridiculous song and the boys’ silly poses.

Thanks to Wambie girl Rafath for the video!

Source:  Music One Direction