Celebrity cameos with the Sesame Street crew are frequent; Ed Sheeran taught us how to behave in school, Bruno Mars encouraged us not to give up and Feist taught us how to count to 4.
Now, it's Nick Jonas' turn to enlighten us with another invaluable life lesson; recognising a pentagon and an octagon. Check that shape by checking out the video below.

And while you're at it if you're a person of simple pleasures like us, why not have a look at our other favorite celeb collaborations with the furry friendly monsters of Sesame Street.

1. Bruno Mars encourages you not to give up.

2. Ed Sheeran puts some manners on you.

3. Feist teach you to count to 4...but no further.

4. One Direction express their undying passion and the utter importance of the the letter 'u'.

5. Will.i.am wants you to be Who.u.are