President Obama and first lady Michelle Obama welcomed Washington-area children and children of military families to trick-or-treat at the White House Monday night. The outside was decorated in an Alice in Wonderland theme, complete with giant teacups and rabbits.

The Obamas brought out their spooky side, dancing to "Thriller":

Here's the video:

There was baby Barack:

Tiny dinosaurs and pirates:

And performers:

Inside, some unwanted guests in the press briefing room (we knew Scott Horsley spent a lot of time in there but that much?):

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