Dermot O'Leary hosts the singing competition as the bootcamp stage continues. Simon Cowell and fellow judges Sharon Osbourne, Louis Walsh and Nicole Scherzinger oversee more dancing and singing challenges, aimed at weeding out the less-talented candidates before next weekend's daunting arena auditions. Dermot O'Leary is on hand as ever to offer support and a shoulder to cry on, but which acts will be continuing on their X Factor journey and which groups and singers are heading home?

In the first of three special Six Chair Challenge episodes, the stakes are high as acts from each category perform individually. Their judge then has to decide if they want the act to take one of the six seats on stage - each one representing a place at Judges' Houses. However, even if they win a seat, the contestants face an anxious wait as no one is safe until the last person in each category has sung. Each judge is able to change their mind at any point, swapping an act already through with someone else who comes on and out-performs them. Who will have what it takes to keep hold of their seat and move one step closer to a coveted place in the live shows?