I'm a fan of Michael Franti's music. A very talented man whom I'm glad to see become more well-known now that he's getting more radio play. Of course radio is pretty narrowly focused in what it will play, and unfortunately, my local station will only play one of his tunes. But it's one I really like, and even better, one my kids absolutely love.
I take my two daughters to school in the morning. It's about a 5 minute drive one way--just enough time for us to sing this at the top of our lungs and start the day with a smile.
Enjoy:
http://www.youtube.com/watch?v=ehu3wy4WkHs