The theme for the first of this year's X Factor 2014 live shows has been revealed, as well as the first guest performers
This weekend the popular singing show moves into its spectacular live show phase.
Kicking off the series, the finalists will be bringing out some of their favourite classic songs that have made it to the top of the charts with this week’s theme – Number Ones.
Each of the contestants will be taking to the stage and performing live for the first time, for the judges and audience at home.
Dermot O'Leary presides over proceedings, while judges and mentors Louis Walsh, Mel B, Cheryl Fernandez-Versini and Simon Cowell take their seats behind the judges’ desk to battle it out with their contestants.
Louis has the Groups, Mel B the Boys, Cheryl the girls and Simon the overs. As the standard is so high this year, the competition is sure to bring drama and disagreements between the judges before too long.
As well as the current twelve finalists, this Saturday night's first show will also see the four wild card acts revealed.
While on Sunday night, it's the first elimination of the series as an act is sent packing after just the one live performance.
There will be special performances from Pharrell Williams, plus another mystery guest.
Browse pictures of the final 12 here...