From Schoolhouse Rock, or, more specifically, Grammar Rock:
Bob Dorough co-wrote, and was credited by the poster on YouTube who put this song up as the vocalist telling the tale of "Rufus Xavier Sarsaparilla". It's really all about pronouns. Wikipedia counters by saying that Jack Sheldon (ex-Run, Buddy, Run) was the vocalist. You decide.
Too bad this is locked in the Disney vaults now.