I'm not posting this because I think you haven't seen this -- if you're a semi-regular reader of this site, this appeared probably a dozen times or more in your social media feeds last week.
No, I'm posting this clip of Jimmy Fallon, The Roots, and a bunch of Sesame Street muppets singing the Sesame Street theme song on Late Night with Jimmy Fallon because I want to make sure I have easy reference to it.
Oh, and because it's awesome.
Jimmy Fallon, The Roots, and cast of Sesame Street - "Theme from Sesame Street" [YouTube]