Pharrell Williams says writing 'Happy' broke him. It went on to become one of the biggest songs of the 2010s.

Tech Insider
An image of Pharell Williams wearing a pink top, sunglasses and a cap who is holding a mic with his left hand while reaching forward with his right.
Pharrell Williams speaking at a special screening of his film "Piece by Piece."

Eric Charbonneau / Focus Features via Getty Images

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