American Idol that season, but left after just one season. On January 11, 2010, Simon Cowell left the show to pursue introducing the American version of his show "The X Factor" for 2011. Jennifer Lopez and Steven Tyler joined the judging panel in the tenth season, but both left after two seasons. They were replaced by three new judges, Mariah Carey, Nicki Minaj and Keith Urban, who joined Randy Jackson in the twelfth season. However both Carey and Minaj left after one season, and Randy Jackson departed the show after twelve seasons as a judge but would return as a mentor. Urban
American Idol (season 9) the show as the new permanent fourth judge for the rounds held at CBS Television City for Hollywood Week and thereafter, onto the live shows. In addition, Simon Cowell announced shortly before the ninth season began that it would be his last season on "American Idol". Cowell left the show to begin preparations for an American version of his talent show "The X-Factor". Also, DeGeneres announced on July 29, 2010 that she would not return to the judging panel because it was not the right fit for her. DioGuardi would also not return as a judge for the tenth season