Timberlake surprises Ellen with dance routine

Justin Timberlake shocked Ellen Degeneres on the comic's chat show on Friday when he showed up just to dance with her.

The comedienne was left speechless when Timberlake joined her for a dance segment at the beginning of her show and told her surprise guest: "There's a rule here that no one ever surprises me," to which Timberlake fired back: "I don't work here."