So I'm continually asking myself if I should be officially counting these references to Wicked as references to The Wizard of Oz. Finally I decided there was no reason not to. I mean, obviously one spawns from the other. So from here on out, I will no longer question the Wicked references. I won't count the same one (i.e., the same billboard or the same commercial, etc.).
All that said, this morning on the radio the DJ was talking about how Wicked is the longest running musical in Chicago (or something like that).
Reference accomplished. Conscience clear. Done and done.