dash of happy", I'm going with the Tedeschi Trucks Band. This band is a new collaboration between singer Susan Tedeschi and guitarist Derek Trucks (who's played with Eric Clapton and The Allman Brothers, among others.) Their music is by turns soulful, funky, and bluesy - and happy.
I recently had the pleasure to see this band in concert, and I can't recommend them highly enough. The musicianship was impeccable, the music uplifting, and the band really was the happiest group of musicians I may have ever seen. They spent the whole two hours smiling, laughing, dancing, and generally acting like it was a great pleasure to be making music for an appreciative audience - which I have to think it was. That spirit of happiness is infectious.
Here is "Simple Things", from their new disc, Revelator.