The singer, who previously took part in BBC's Fame Academy as well as reaching last year's Boot Camp stage of the competition, is hoping to progress further second time around.
Louis Walsh opted not to take Poole through to the live shows last year, controversially picking the eccentric Goldie Cheung instead. When Cheung pulled out of the competition, Walsh brought back Sami Brookes rather than Poole.
The 31-year-old country singer performed a rendition of Miley Cyrus hit 'The Climb' at the start of the competition last year, which was praised by Gary Barlow for being "an amazing audition".
More recently Poole landed a minor role in ITV1 soap Emmerdale.
Poole's celebrity friend Lucy-Jo Hudson took to Twitter yesterday (June 7) to confirm the singer's return to the ITV1 show, posting: "So proud of my bezzy @CarolynnePoole tonight. She was amazing at the XFactor auditions. Fingers crossed she makes it big this year. X"
Poole is not the only former contestant to try her luck at the competition for a second time in 2012. Melanie McCabe, Scottish singer Jade Richards and Joe Cox have all returned for another crack at reaching the final rounds of the talent contest.
> Gary Barlow backs Mel B for full-time 'X Factor' judge spot
> Gary Barlow 'wanted by BBC to join The Voice UK'
Watch Carolynne Poole auditioning for The X Factor 2011 below: