The Sven Song (in the 2021 version of this episode) is a parody of "The Fountain in the Park" (aka "While Strolling Through the Park One Day").
The updated 2021 version was produced during the 2020-2021 coronavirus pandemic, with Svengoolie's host segments recorded from his "at-home" locations of stately Sven Manor and the top-secret Sven Cave, and Doug Graves contributing remotely for the Sven Song.