Not too keen on the following rumor, but I do trust the source as it originates from Mark Joshua from SimVIP.  Apparently PlanetSims picked up on the fact that Mark let a little something out about the second expansion for The Sims 3:

During our chat, MM left “escape” a valuable piece of information when he was in California, the game’s developers said they have almost Super Star in The Sims 3, hopefully in the next expansion, imagine the possibility of having stars will Holywood in our game? Let’s wait for the good news, where there’s smoke there’s fire.

Personally, I wouldn’t get my hopes up just yet – all in due time.

Thanks to Dimensao Sims and SimOperations for the tip.