"A Thin Line" Sneak Peak
![](https://tv-fanatic-res.cloudinary.com/iu/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1379954389/user/steve-marsi)
In this clip from an unprecedented Gossip Girl event, Serena has it out with Blair over a rumor that got started... most likely involving Serena being preggers. "A Thin Line Between Chuck and Nate" looks like it will shape up to be a great episode!