There are a lot of versions of "Happy" by Pharrell Williams out there at the moment. I'm not surprised. It's the kind of song that is so catchy, so positive, that I'll bet that people are still listening to it fifty years from now.
This is my current favorite "music video" version of the song.
(Pharrell Williams - Happy (Split, Croatia))
Here are a few of the reasons I love this particular video:
-It's in Split, where I've been, and I recognize the city, even though we were just there for part of a day.
-The people in it seem like regular people just around the city.
-They are, however, better than average dancers as a whole.
-There are some folk dancers. :)