"Are those elves singing?"
"Aye, lad. Dorwinion Red Wine does a number on them."
"Yeah, but why does the butler want to be called "Maybe?"
Even with Neil Gaiman singing this one, I still maintain that "Supercar," another Gerry Anderson show, had the best theme song of all time.
Not to be outdone by cats, here's a dog singing the "Game of Thrones" theme.
Get Over Here and Play a Video Game
(William Shatner, Star Trek)