A very special guest joined Conan O’Brien for his Los Angeles comedy shows: Jim Carrey. Dressed as a superhero, he sang a duet of Five for Fighting’s “Superman” with O’Brien that involved lots of theatrics, thrusting…and Carrey on trombone. After the first night’s show, Carrey—in his now-typical fashion—took to Twitter and rather oddly tweeted, “Loved doin' concert with Conan!So many faces wide open like kids!The world was new and worry forgotten by all of us! That's was BOING!!! ;^)”