Could it be that so many of these no marks are "celebs" these days that they are just bloody everywhere.
OK discounting the "no marks", Sir Bobby, MJ, Patrick Swayze, Keith Floyd, Natasha Richardson, Farrah Fawcett, Edward Kennedy, Dom deLuise, Billy Mays, David Carradine, Ed McMahon, John Hughes, Les Paul to name but a few.
It's a pretty long list...