One Direction Appear On Sesame Street, Explain What Makes 'U' Useful

18 November 2014, 16:30 | Updated: 8 May 2017, 17:09

It's what we've all been waiting for.

One Direction have explained that tricky b*stard 'U' through the medium of song.

Ukelele, udon, unibrow. If only we'd had this kind of high-brow education growing up, we'd have been MULLIONAIRES by now.

And the GIF you didn't know you were missing...

Watch in full below as One Direction sing 'What Makes U Useful'.