while Fox has the youngest-skewing viewer base, CBS is consistently regarded to have the oldest audience demographics among the major broadcast networks. Fox hit a milestone in February 2005 by scoring its first sweeps victory in total viewership and demographic ratings, boosted largely by its broadcast of Super Bowl XXXIX and the strengths of American Idol, 24, House, and The O.C. In September 2006, as a result of the increasing number of over-the-air Fox affiliates and the increased availability of digital subchannels carrying Fox in certain markets, Foxnet was discontinued. Then, a sweeping milestone came by the conclusion of the 2007–08 season on May 21, 2008, shortly after the widely acclaimed seventh-season finale of American Idol, when Fox outranked longtime leader CBS as the most-watched television network overall in the United States, attributed to the strengths of Super Bowl XLII and its NFL game coverages, Idol and House during that season. To date, Fox is the only non-Big Three network to top the overall Nielsen ratings since its inception in the 1950–51 season. In the late 2000s, Fox launched a few series that proved to be powerful hits in different respects. In 2007, the network began production on the game shows Are You Smarter Than a 5th Grader? and Don't Forget the Lyrics; both shows ran for a total of three seasons each, making them the longest-running game shows in Fox's history. In 2008, the supernatural mystery series Fringe debuted to moderate ratings but earned critical acclaim during its first season on Tuesdays. Throughout its run, the series developed a large loyal fanbase that turned the show into a cult favorite. In 2009, Glee premiered to average ratings when its pilot aired as a lead-out program of the eighth-season finale of American Idol, but earned positive reviews from critics. The cast of the series has been acknowledged by Barack Obama and Oprah Winfrey, who have each asked the cast to perform live for various national events. 2010–2017: Network's ratings collapse and revamp in network programming At the dawn of the 2010s, new comedies Raising Hope and New Girl gave Fox its first live-action comedy successes in years. The second season of Glee delivered that series' highest ratings during the 2010–11 season, with viewership peaking during its Super Bowl lead-out episode in February 2011 (marking the most expensive post-Super Bowl episode ever produced on U.S. television). The said show has continuously