Three chord song

I've got a happy little song it's in the key of C.
I'll add an F chord and then I,ll added G.

CHORUS
We've got a three chord song that we can sing and play.
We've got a three chord song and now we are on our way.

We'll write the words and we'll try to make some sense;
Of all the things that surround us, past present and future tense.

Chorus

We'll start a band and we'll practice for a while.
The music that we play is sure to bring a smile.
So I'll sing this happy song and you can sing along.
It's easy to play, even in the key of a.

Chorus times two