Get ready for a totally '80s flashback on Gossip Girl!

Below is a sneak preview of the Gossip Girl spinoff starring Brittany Snow. The new series will be teased in flashback sequences during Monday's episode. Here's Lily (Snow) getting into an argument with her big sister Carol (Krysten Ritter), in their teenage heyday ...

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Follow the jump for more clips of Lily in the '80s ...

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[video url="http://www.gossipgirlinsider.com/videos/valley-girls-sneak-preview-6/" title="Valley Girls Sneak Preview #6"][/video]

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