Belief (John Mayer)

I'm writing a sheet with chords for John Mayers Belief:

http://www.allthelyrics.com/lyrics/j...cs-896393.html

Of course there's a verse and then there's something like a chorus with the lyrics:

Oh, everyone believes....

After that there are another two verses and that chorus again.

But how would you call that part?:

We're never gonna win the world
We're never gonna stop the war....


How would write down the singing at the end:

Da - da - da da na na?