Bobby McFerrin on "Vocabularies"

Bobby McFerrin is widely known for his Eighties hit "Don't Worry, Be Happy," but he is admired for many other things. For the past eight years he's devoted himself to a project called "Vocabularies," which is now out as an album. It's a mix of 1400 separate tracks sung by 50 different singers, and he tells Steve Paulson it was a labor of love.