Blake Lively at David Letterman

Watch the video here (link to the youtube video)

Letterman: Gossip Girls is about upper east side New York kids, in prep school, and someone who does this blog that is gossippy.....(and so on..)
Lively: You know it! You watch it! (laughs)
Letterman: (laughs) Sad, isn't it?
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Haha, David Letterman is fun, man.