Build me up Buttercup by the Foundations always makes me happy. I have no idea why, I think that fact that it has no memories whatsoever attached to it means there is no poignancy, nada..just good and uplifting.
But this one plays over and over again in my car, my best driving track: Sweet Home Alabama
BUT this one can only be played VERY VERY LOUD (and regularly is!)
If you fancy it uncensored