I was able to transcribe this much from a sound sample. It's a waltz:

BETTY LORRAINE (BETTY LOU) - Excerpt
Johnny Horton

The girl I love is waiting where the delta kisses the sea.
The pine trees sway with the evening tide. That's where she's waiting for me.
Her smile's as soft as a velvet rose*. Her heart's as gay as champagne.
Her hair is as black as a raven, my beautiful Betty Lorraine.

Her eyes they shine like the mornin' star. Her lips are as warm as the rain....


*[or "a robin's breast" in one version]