Many Trinidadians can apparently sing the chorus of "Jean and Dinah" composed in 1956, or even the whole song, starting from "Well, the girls in town feelin' bad, there's no more Yankees in Trinidad.."
(I'm not Trinidadian, but I know the whole song. And when I become a calypsonian and if I ever have kids, I'll sing it to them. In fact, I might start teaching it to my cousins.)

In Rob's definition, "Jean and Dinah" is a folk song.

And now it's in my head. I'm still singing "Jean and Dinah, Rosita and Clementina,
Round the corner posin',
Bet your life is somethin they sellin'..."