We Must Do This

We Must Do This is an upcoming Cartoon City song, it will appear in it's 320th Episode, which is of course the final episode.

Lyrics
Phineas: What are we gonna do?

SpongeBob: We are doing this (doing this x7)

We are gonna so this (gonna do this x7)

Phineas: Ok, we are so doin' this (doin' this x7)