Conan O'Brien was concerned about how his staff of "Late Night" was feeling after 9/11 that he brought in Ozzy Osbourne to cheer them up.subscribe to the Laughing Squid NewsletterThe post Conan O'Brien Surprises Late Night' Staff With a Visit From Ozzy Osbourne To Cheer Them Up After 9/11 was originally published on Laughing Squid.