OMTG this is one of our fave stories of January - One Direction are going to be on Sesame Street!
The usually super-cool band filmed an appearance on the show singing a new, kids' version of their hit song: What Makes You Beautiful.
For Sesame Street, the song has been changed to What Makes U Beautiful and is all about the letter 'U'! LOL!
We love that 1D, even though they're crazy busy, take some time out to make their youngest fans happy.

Blast from the past: check out the video clip for the original What Makes You Beautiful!
(If it doesn't work on your mobile or tablet, try a laptop or desktop computer.)

What's your fave thing that One Direction do?