SAN FRANCISCO (CBS SF) – Pharrell Williams has a lot be “Happy” about these days. The extra-large hat he wore at the Grammys fetched over $40K from Arby’s benefitting “One Hand To Another.”

Williams just released his latest album “G.I.R.L.” and has a number #1 hit song “Happy.” Now it seems that everyone wants be like him, to the point where people would film their version of his “Happy” video and posting it onto YouTube.

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The phenomenon has hit viral levels and has replaced flash mobs as the next big thing. Musician Michael Franti caught the viral bug when he and the Alice@97.3 morning show, Sarah & Vinnie decided to create their version of the hit music video for the United Nation’s International Happiness Day.

WATCH THE VIDEO:

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United Nation’s International Happiness Day is on March 20.