Verified answer

I might be wrong, but I think it's a Hummer commercial.

The best way to get the answer is at www.adtunes.com - just use their search feature and type in "Hummer", and/or a key visual idea from the commercial, e.g. "squirrel", "dancing", "aliens", etc.

Make sure you set the search time frame to the max - one year, I think - so you don't miss any possible older results. Add details if you can, like a snippet of the lyrics.

Other choices are sites called www.splendad.com or www.duncans.tv.

For UK ads, try:

www.whatsthatcalled.co.uk

or

www.whatsthattune.co.uk

Hope that helps - the answer should be on one of these! It's possible, however, that it might have been created specially for the ad.