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 run, Idol's contestants have sold more than 60 million albums in the US, resulting in more than 80 Platinum records and 95 Gold records. Its participants have generated more than 450 Billboard No. 1 hits and sold more than 260 million digital downloads. The impact of "American Idol" was also strongly felt in musical theatre, where many of "Idol" alumni have forged successful careers. The striking effect of former "American Idol" contestants on Broadway has been noted and commented on. The casting of a popular "Idol" contestant can lead to significantly increased ticket sales. Other alumni have gone on to