At least I know I'm free

And I'm proud to be an American,
where at least I know I'm free.
At least that's what they told me
I believed it when I was three.

And I'm proud to be an American,
where at least I know I'm free.
These words would ring much truer
Outside of the penitentiary

And I'm proud to be an American,
where at least I know I'm free.
I fell in love with two gals
Now I'm doing time for bigamy