Yo, Bat Goddess (great handle): Those recordings using lines from pop songs were done by the duo of Buchanan and Goodman, who started out in the 1950s with a number called "Flying Saucer." I remember hearing them on the radio. Trivia note: Walter Brennan, besides singing Old Rivers, was a three-time Oscar winner. And although we may think of him as the quintessential coot from the old west, he was from the old east, born in Massachusetts.