X is the tenth studio album by Australian singer Kylie Minogue. It was released on 21 November 2007 by Parlophone. It is her first release since the greatest hits compilation Ultimate Kylie (2004), and her first studio album since Body Language (2003). Work on the album began following Minogue's gradual recovery from breast cancer and subsequent radiotherapy treatment. Her cancer, which was diagnosed in May 2005, resulted in the postponement of Showgirl: The Greatest Hits Tour midway through its run. Minogue resumed the tour in late 2006, in the midst of recording X, and was completed later in the following year. The album introduced new American and European producers including Bloodshy & Avant, Guy Chambers, Calvin Harris and Freemasons.