This is interesting in its own right: it’s a side-by-side look at what the Weird Al ‘Perform This Way’ video looked like before and after they put all the CGI in. Turns out they muck about with a lot of stuff, these days. Not just the faces.
It is merely a parody OF Taylor Swift. Found here: for some reason, the video is currently unlisted, which is why I’m not putting it up directly. The costuming for ‘Bat Blood,’ by the way, is fairly impressive. And evocative of a bunch of different Batman eras, at that.