Unfabulous is an American teen sitcom that aired on Nickelodeon. The series is about an "unfabulous" middle schooler named Addie Singer, played by Emma Roberts. The show, which premiered on September 12, 2004, was one of the most-watched programs in the U.S. among children and teenagers between the ages of 10 and 16. It was created by Sue Rose, who previously created two animated series Pepper Ann (for Disney) and Angela Anaconda, and co-created the character Fido Dido with Joanna Ferrone. The series ended on December 16, 2007, with the final episode titled "The Best Trip Ever".

Most of the episodes are narrated by Addie, and are told in flashbacks. The show's theme song is performed by Jill Sobule, who also wrote the songs performed throughout the show.