Do Blair and Serena still goes to Constance Billiard School?

I'm up to season 2 in Gossip Girl, and I want to know if in season 4, blair and serena still goes to Constance Billiard school because Gossip Girl will be filming around my area today, its supposed to be a scene in front of Constance Billiard School and I want to know if Leighton Meester is going to be there or not, thats why I'm asking. Thanks.