Gossip Girl prom sneak peek, and oh, everybody's so pretty!

Want more? We've also got four additional clips from the "Lily" parts of the episode, including Brittany Snow and Krysten Ritter breaking and entering with Ryan Hansen back in Lily Rhodes' 1980s heyday! This is, indeed, a good day and it looks like a hell of a Gossip Girl episode!

Gossip Girl's "Valley Girls" episode airs Monday at 8 p.m. on the CW.

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