Put a Banana in your ear

A very famous phrase and song used in the popular youtube video "Charlie the Unicorn 2". In the video two unicons come up to Charlie and they want him to come along with them to see the Banana King but of course Charlie doesn't want to go because the last time he followed these strange unicorns he lost his kidney. But for some reason he goes anyway. But near the end of the episode they find a strange slug with a santa hat on. The slug soon begins to sing the "Put a banna in your ear" song...