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Pharrell Williams Blurs Lines With Daylong Music Video

Multi-music hyphenate Pharrell Williams hit it big earlier this year with the song, "Blurred Lines," which he co-wrote. Now Williams has blurred the lines of what makes a music video. The 24-hour-long music video for his new single, "Happy," has people dancing and lip-synching down Hollywood Boulevard in Los Angeles as the song loops over and over. Mimi Valdes, Williams' creative director, was on set for every day of the 11-day shoot, and she tells Robert Siegel and Melissa Block about the process.