Five years after NBC answered the question the first time, it's now coming up again: Who will be the next "Tonight Show" host?

During the past two years, the number of people who bought music dropped by 20% to 93 million in 2009, versus 116 million in 2007. This was a part of a 10% overall pullback in 2009 of all music revenues in all recorded formats. Looking at the music business's downward trend, one can only wonder if the TV/video market could be headed in the same direction.