WATCH: Casey Kasem Does "Top Numbers" Top Ten List On Letterman
Posted June 17th, 2014 @ 2:58pm by Adam West
(Photo courtesy of YouTube)
21 years ago, broadcasting legend Casey Kasem made an appearance on Letterman that was memorable because he did it like his weekly #AmericanTop40 Countdown show.
R.I.P., Casey. You are missed!