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
David Jackson (judge) David Jackson (judge) The Honourable Justice David Jackson is a Judge in the Supreme Court of Queensland which is the highest ranking court in the Australian State of Queensland. He was appointed to the Supreme Court of Queensland on 8 October 2012. Jackson was called to the Queensland Bar in 1977 and appointed Queen’s Counsel in 1990. Jackson now sits on the Commercial List of the Supreme Court of Queensland. In August 2014 he was appointed as Chair of the Queensland Law Reform Commission. The appointment of Jackson as a judge was controversial as he was, and is still currently,