Traits on parade: Why I can't stop watching 24 hours of "Happy"

When I first heard about Pharrell Williams's 24-hour long video of his hit song "Happy" I thought it sounded like a unique, new form of torture. This went way beyond earworms.

Boy was I surprised.

Opening image from the videoThe video is one continuous shot of one person or small group after another lip synching to Williams's song as they move/dance through various locations in and around Los Angeles. Williams himself appears once an hour on the hour, for 24 appearances. In between, if I've don...