American Idol (season 9) spots of the season. Viewership for the Tuesday episodes averaged 22.974 million, while the Wednesday episodes averaged 21.951 million. American Idol (season 9) The ninth season of "American Idol" premiered on January 12, 2010 and concluded on May 26, 2010 on Fox. Simon Cowell, Randy Jackson and Kara DioGuardi returned to the judging panel. Ellen DeGeneres joined the panel as a replacement for Paula Abdul after guest judges filled in during the auditions. Idol Gives Back also returned for the season and was held on April 21, 2010, during the top seven results show. The top 24 semi-finals format used
Randy Jackson was later decided that he would remain as a judge for season 12. On May 9, 2013, Jackson announced that he would be leaving "American Idol" after twelve seasons due to him wanting to focus on other business ventures. On September 3, 2013, it was announced that Jackson would replace Jimmy Iovine as the in-house mentor on "American Idol". He departed the series for good in November 2014. Jackson produces "America's Best Dance Crew", an American group dance competition and reality television show, which premiered on February 7, 2008 on MTV and was cancelled in 2010 due to declining ratings.