A late-night talk show is a genre of talk show popular in the United States, where the format originated. It is generally structured around humorous monologues about the day's news, guest interviews, comedy sketches and music performances. The late-night talk show format was popularized by Johnny Carson with The Tonight Show Starring Johnny Carson on NBC. Typically the show's host conducts interviews from behind a desk, while the guest is seated on a couch. Many late night talk shows feature a house band which generally performs cover songs for the studio audience during commercial breaks and occasionally will back up a guest artist.