Blair, no stranger to plotting, scheming, and general deviousness, really outdoes herself when she lies to Chuck about "the game," and gets him to kiss Ellis. When Vanessa actually gets the better of her and secretly mics Blair's "I'm better than you" speech, Chuck is disappointed and takes off. Even Lily gives Blair sage relationship advice about how badly she's screwed up. Lily! Relationship advice!
However, the kiss between Chuck and Ellis isn't necessarily a WTF moment (love how Chuck didn't even bat an eye when Blair asked to pimp him out), but it makes Chuck deliver the best line of the night: "You really think I've never kissed a guy before?"
But here's the big Blair question . . . are she and Chuck headed for a breakup?