SNEAK PEEK: Blair’s Enemy Makes a Move on the New Gossip Girl

03/13/2009 AT 12:00 AM EDT

Someone's out to get Blair! And -- let's be honest -- it could be anyone.

Gossip Girl returns to the CW Monday (March 16, 8 p.m. ET) with an all-new episode -- and it looks like Blair is in for another scandal.

In an exclusive clip, B is accusing Nelly Yuki of "ratting her out to Yale" to steal B's spot at the Ivy League school. But Yuki denies it and, in the midst of a blow-up backstage at the Senior class's production of The Age of Innocence, the entire cast gets a text -- from Gossip Girl herself. The text dishes the dirt on B's salacious romance with the Lord. Says the text:

"Wanna hear the sickest scandal ever? Remember B's Lord? Turns out he was giving the royal treatment to his own Queen Mother. And the worst the part? B knew, and ignored! How desperate can you be, B?"

Someone (not Nelly Yuki!) knows B's secrets -- and has an axe to grind.

Tell us: Who is out to get Blair?

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