What else do you need to know? You knew this was on our radar. And now, it's here; the Muppet Barbershop Quartet's cover of "Smells Like Teen Spirit" for The Muppets original soundtrack. Dive in below: [videoembed size="full_width" alignment="center"][/videoembed] If that comes down, try covermesongs. I'm still holding out for a "Serve The Servants" cover, but I'm not holding my ...