The greatest lie ever told is that athletes and rockstars are 'dumb'.
All serious musicians I know are nerdier than most denizens of /b/. You have to be if you have to devote 8+ hours to an instrument (in the case of athletes, that instrument is their body).
They just manage to do a very good job of masking it.
Honestly, I might have had a different career trajectory had I known that you could be nerdy and still be a cool rockstar or athlete.