Also featuring Margeret Cho and Kristen Schaal, Jack Black's appearance in Weird Al's Tacky, a spoof of Pharrell's Happy, is even more impressive when you realize that the entire video was shot in a single take. The coolest thing about Black's appearance, however, is how into the performance he is. He looks like he's having the time of his life simply by being in a Weird Al video, and when you consider Black's age and profession, he probably is - many of us grew up with Weird Al, after all.