Aside from the magical Chair moment, perhaps the most buzzed-about portion of Monday's season finale was Georgina Sparks' surprise appearance toward the end - and her declaration that she will be attending NYU and rooming with Blair!

But with Michelle Trachtenberg, who plays Georgina, starring on a different series next fall, is she really joining the Gossip Girl cast, as this scene implies?

Looks like yes and no. Here's what Michael Ausiello of Entertainment Weekly has to say about that particular Gossip Girl issue in his weekly spoiler Q&A ...

Q: I just finished watching the Gossip Girl finale, and it was awesome. My question for you is about Georgina: At the end of the episode she announced she was going to be Blair's roommate at NYU - strongly implying that she would be a presence, if not a regular character, in season 3. But Michelle Trachtenberg is in NBC's new drama, Mercy.

What does this mean about Georgina and Gossip Girl?

A: It means producers thought ahead and made sure Michelle Trachtenberg negotiated a three-episode Gossip Girl "out" in her Mercy contract. You didn't really think the Georgina-Blair roommate thing would last longer than that, did you?

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.