The ninth season of American Idol premiered on Fox on Tuesday, January 12, 2010, and concluded on Wednesday, May 26, 2010. Simon Cowell, Kara DioGuardi, and Randy Jackson returned as judges and were joined by Ellen DeGeneres, who was brought on as a replacement for Paula Abdul after a series of guest judges filled in during the auditions. Idol Gives Back also returned on April 21, 2010. The top 24 semifinal format used in the fourth through seventh seasons also returned this season. Cowell, DioGuardi, and DeGeneres all left the show after this season, although only Cowell's departure was announced in advance.
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Kara Elizabeth DioGuardi is an American songwriter, record producer, music publisher, A&R executive, and singer. She primarily writes music in the pop rock genre. She has worked with many popular artists; sales of albums on which her songs appear exceed 160 million worldwide. DioGuardi is a 2011 NAMM Music for Life Award winner, 2009 NMPA Songwriter Icon Award winner, 2007 BMI Pop Songwriter of the Year, and has received 20 BMI Awards for co-writing songs.
DioGuardi in 2007
DioGuardi in 2010