I was craving the song too, so I did my own research and found that it was created by an ad company in Canada. Their website is
www.pirate.ca
Check out their 'Spot of the Week' archive, and look for BMW/Austin Mini ad and you'll find a little thing on it. I wish it was an entire song but it was just created for the commercial. Also, can't download the song and it's been hard to find...anyways, hope this helped

> Checked the website, e-mailed them twice and still no luck.
: The song's lyrics go something like
: 'My money's on the little guy
: on the original, on the small fry
: cuz the bigger they are, the harder they're gonna fall
> My money's on the little guy
: he can keep it close, or he can take it outside
: One day, you're really gonna show them all.'
> PLEASE I can't get this song out of my head. I need the artist or title
> Any help would be greatly appreaciated