Live Action Puppet The Simpsons With A Katy Perry Guest Cameo?

What is even going on here?

So, it’s a Muppets Show parody but also poking fun at sitcom conventions and Katy Perry is wearing a dress featuring The Simpsons ON THE SIMPSONS for some reason but then doesn’t even really sing and there’s some kind of coded dig at Sesame Street going on, too, because of the whole Katy Perry on Sesame Street thing even though that was months ago and no one needed The Simpsons to comment on it, and absolutely none of it whatsoever has anything to do with Christmas? Do I have that right? Because I stopped watching The Simpsons 35 years ago and Katy Perry sucks, so maybe I’m missing something.