Monday night's Gossip Girl episode, "Valley Girls," featured mother-daughter conflict in multiple generations - as well as a truckload of '80s fashion and music.

As Serena butted heads with Lily, we flashed back to 1983, when a rebellious young L clashed with her mom CeCe (also seen in this episode in the present).

While Lily and sis Carol were up to no good a quarter-century ago, the Upper East Siders went to prom - and you won't believe what Chuck pulled this time.

Missed the episode? Want to relive the drama? Just want to read a fun rundown of events? Follow the link for the Insider's episode recap of "Valley Girls."

Be sure to check out our gallery, videos, music guide and list of Gossip Girl quotes (work in progress) as well. Our Round Table discussion is still to come!

Thank you for watching with us! Leave comments below and in the forum and let us know what you thought of last night's Gossip Girl!

No Doubt, a.k.a. Snowed Out, rocks the house on Gossip Girl.

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.