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
Pop Idol the world, including original "Pop Idol" winner Will Young, "American Idol" winner Kelly Clarkson and "Australian Idol" winner Guy Sebastian, competed in a one-off competition, complete with a large judging panel featuring one judge from each country (Simon Cowell officially representing "American Idol", with Pete Waterman the "official" UK judge). The surprise winner was Norway's Kurt Nilsen, who proceeded to minor UK chart success. Cowell was strongly critical of "World Idol", and it is highly unlikely to be staged again. After the second series of "Pop Idol", ITV put the show on indefinite hiatus when in April 2004 judge and