We've seen episode clips featuring the current crop of Upper East Siders, but now, Brittany Snow previews the flashback portions - and possible spinoff pilot - in tonight's episode of Gossip Girl, "Valley Girls," where she'll be playing young Lily Rhodes.

Here's a promotional interview she gave for the CW ...

[video url="http://www.gossipgirlinsider.com/videos/brittany-snow-on-lily-rhodes/" title="Brittany Snow on Lily Rhodes"] [/video]

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