Demi Moore Twitters With Dave Letterman, Sits In His Lap (VIDEO)

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Demi Moore joined David Letterman Monday night, and he looked thrilled when she got up from her seat to come around and sit on his lap.

The pair were talking about Twitter, which Demi loves and Dave avoids, and she decided she wanted to tweet a photo of the pair.

She said on his lap, took an iPhone snap of them, did a "vanity check" and posted the photo along with the message, "Me on Dave's lap Woo hoo!" WATCH: