Gossip Girl (2.12): It's a Wonderful Lie | Gossip Girl Spoilers & Preview | Tv Zine 

For the annual Snowflake Ball, Blair and Chuck make a bet that they can find the ideal dates for each other. Aaron's ex-girlfriend, Lexi, expresses an interest in Dan which creates conflicted feelings for Serena.
Keywords: gossip girl, blair, chuck, season 2, nate, video, dan