do any of u know if there will be a season 21?

yes there is, already was Homer the whopper and Bart gets a Z

There will be not only season 21 but season 22 too. Read it in a spanish magazine.

yes it will! :D

Here are some of the episodes (I think) :

- Homer the Whopper
- Treehouse of Horror XX
- Bart Gets A 'Z'
- The Great Wife Hopper- The Devil Wears Nada
- Pranks and Greens

yes