Hey Upper East Siders --
Guess who's joining the cast of Gossip Girl? A little birdie at TV Guide says that Michelle Trachtenberg will be playing Georgina Sparks, an old friend of S's who comes back to bring the former party girl back to the dark side. (Hmm, wasn't that the part that Mischa Barton turned down?) We don't think Lonely Boy will be too pleased when he hears about this.

You know you love us.
XOXO, Gossip Girl