The twelfth UK series of The X Factor began on ITV on 29 August 2015. The live shows started on 31 October. In a change from previous series, there were seven weeks of live shows instead of the usual ten. Viewers were asked to decide which categories would be assigned to each judge by voting on Twitter during the series premiere. The results were announced on the day the Six Chair Challenge was filmed.Nick Grimshaw mentored the Boys, Rita Ora mentored the Girls, Simon Cowell mentored the Overs and Cheryl Fernandez-Versini mentored the Groups.
The twelve chosen finalists were Ché Chesterman, Seann Miley Moore, Mason Noise, Louisa Johnson, Lauren Murray, Kiera Weathers, Bupsi, Anton Stephans, Max Stone, Alien Uncovered, 4th Impact and Reggie n Bollie. On 29 October, Monica Michael (from the Girls category) was announced as the only wildcard on this series, with all four judges agreeing on it.
The "Boys" category is mentored by Nick Grimshaw. Contestants in this category are male soloists aged between 16 and 25. The six candidates at judges' houses were: Ché Chesterman, Ben Clark, Josh Daniels, Simon Lynch, Seann Miley Moore, and Mason Noise. Grimshaw chose:
Ché George Chesterman, Jr. (born 7 December 1996) is a singer-songwriter from Basildon, Essex. Prior to auditioning for The X Factor, he used to work stacking shelves at a Tesco in Langdon, Essex, but quit to pursue his singing career. Chesterman's father, Ché Sr., auditioned for series 3 of The X Factor in 2006 and made it through to boot camp. Chesterman studied music at college, which is where he realised his passion for performing. He was the lead singer of a band called Jinx, before they split and he decided to audition for the show.
With the eliminations of Seann Miley Moore in week two and Mason Noise in week four, Chesterman became Grimshaw's last remaining act in the competition. Chesterman was in the bottom two in week four alongside Anton Stephans, but was saved after only Cowell voted to send him home. He was in the bottom two again in week six alongside Lauren Murray and was sent through to the final via public vote due to the judges taking the decision to deadlock. He finished in third place in the competition. Chesterman took part in The X Factor Live Tour 2016.