The only one I've committed to memory goes like this....

(Sung to the tune of "Country Roads")

"Almost Heaven
Oklahoma!
Big Red River
Lots of dust and tumbleweeds.

Country music
Leon Russell too!
Then there's Conway Twitty
In Oklahoma City.

(Chorus)
Country Roads
Take me there.
I need a change
Of underwear.
Oklahoma
Welfare for all!
Take me home
Country Roads.

Up in Tulsa,
I met the cutest squaw.
I tried to kiss her
But she swung hard
And Broke my jaw."

I can't remember the second part of the second verse but you just repeat the chorus and you're done.

Hubby