Instagram selfies. Yelp warfare. Comic Sans. No Internet no-no is safe in Weird Al's latest parody, "Tacky," set to the tune of a certain Pharrell Williams hit I've been trying to get out of my head since May. The video features cameos from several comedians, including Jack Black and "Modern Family" star Eric Stonestreet, and looks like it must have been incredibly fun to film. Or maybe I'm just tacky.