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Despicable Me

Pharrell Williams, a 'Happy' and busy guy

Pharrell Williams, a 'Happy' and busy guy

Pharrell Williams looked wiped out.

Late on a recent evening, the singer-rapper-producer was shuttling between two studios at a Melrose Avenue recording complex. In one he was working on music for this spring's "The Amazing Spider-Man 2," which he's scoring along with Hans Zimmer; in the other he was supervising final mixes for his upcoming solo album.

Now Ryan Seacrest's people had arrived to shoot Williams' cameo in a video, set to his song "Happy," marking the 10th anniversary of the radio host's popular morning show.