Just a slight correction (not caught up -- guess which message I just read), Showtime didn't use the Late Night fame system on its own. If you didn't have Late Night, you didn't have celebrities. However, if you did have Late Night, Showtime, just as every other EP in the game as well as the base game, incorporated it so you got celebrity status under various circumstances.
I liked that in Sims 3 -- features like that were added to all the EPs. Like Season's festival lots -- every single world officially released got one, though for a couple of store worlds you had to look on the exchange for the Simguru made ones.
