Funny thing. A friend of mine recently got a Mini and when we took it to his mother's house she started singing that very song. We thought she was a little crazy because neither of us had ever heard it before and it's not like she was into Minis before this one showed up. We kind of thought she was making it up off the top of her head to be goofy. But it went on a little too long and sounded a little too good to just make up on the spot. But now that I see others can verify this song exists, I should realise I there is always something that can still be learned from our mothers.
All you mothers out there, you rock.