Jimmy Kimmel invited one of the most unexpected guests to join his writing staff this week. 

After growing up watching him on tv, Kimmel invited the cookie monster to see if he could land any jokes for the show…

See what he came up with… let’s just say he certainly has a childish humour!

Want more? Here's one of our fave moments from Jase & Lauren – they’re always up to something! Weekdays from 6AM on KIIS 101.1!