The definition of "happy tears."
Pharrell made a song called "Happy" that made a whole lot of people really happy and that made him so happy he's crying. Connectedness! Pop music is a flat circle. Oh wait, that's vinyl.
In the below clip from an interview with the music mastermind, Oprah shows Pharrell a supercut of people around the world making their own videos to his song, and he gets verklempt in a way only Oprah can inspire. The only way it would have been more emotional is if he reached into his giant hat and pulled out an over-sized hanky.
(by Bob Powers)