Actually, googling around, I also think some of the lyrics might also have something to do with this Fay Lovsky song, but I can't imagine where I might have heard it. But the two snatches of lyrics I clearly remember are "So I took the A train, DA dee dee DA dee duummmmm...") (where the scat is non-remembered lyrical syllables) and "I've got a four o'clock in America." Which I think also referred to a train.
Actually, I think the whole song was about trains.
She was singing well.
Wish I remembered how to write music. Maybe somebody would recognize the tune.