Clark, who reached the final of Price's Sky series, will appear on the ITV1 show when it starts back later this month, reports the Daily Star.
The 23-year-old has previously auditioned unsuccessfully for Big Brother.
Other contestants on this year's show include returning acts Joe Cox, Melanie McCabe, Jade Richards and Carolynne Poole, who were were all dropped from the series before the Live Shows in 2011.
Ex-Pop Idol singer Hayley Evetts has also auditioned for a second shot at fame.
The X Factor series nine starts on Saturday, August 18 at 9pm on ITV1.
It was confirmed today (August 13) that this year's X Factor final will be filmed in Manchester.