And their--eh, interesting--jammies.
If you aren't among the more than 7 million views the video's had already, the telegenic couple show off their rapping (and questionable dancing) skills with a recap of their productive 2013, including Kim's bit part in "Iron Man 3."
While Penn's appearance in the "Iron Man" sequel was (a lot) shorter than Kim's, his verse on the song is still notable. In it, he announces he's leaving his job as a local news anchor in Raliegh, NC, to join his wife at a production company where the video was originally posted.
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