In tonight's Judges' Houses episode, Gary Barlow, Kelly Rowland, Tulisa Contostavlos and Louis Walsh each chose four acts from their assigned category to advance to the live shows.
Barlow picked Marcus Collins, Craig Colton, James Michael and Frankie Cocozza as his Boys, eliminating Luke Lucas, Max Vickers, Joe Cox and returning contestant John Wilding.
Group mentor Contostavlos, meanwhile, opted for Nu Vibe, 2 Shoes and Rhythmix over The Lovettes, Estrella and Girl V Boy. In an X Factor first, she also took Charlie Healy, the lead singer of rejected band The Keys, and put him through as part of rival boyband The Risk.
In the Overs category, Walsh chose for the final shows Kitty Brucknell, Johnny Robinson, Jonjo Kerr and Goldie Cheung, though the latter has been replaced by Samantha Brookes after she chose to quit the show. Joseph Gilligan, Terry Winstanley and Carolynne Poole were sent home.
Rowland, mentor of the Girls category, completed the lineup by selecting Janet Devlin, Amelia Lily, Misha Bryan and Sophie Habibis over Jade Richards, Holly Repton, Melanie McCabe and Sarah Watson.
The Top 16 will sing live for the first time when The X Factor returns for a two-and-a-half hour episode next Saturday at 7.30pm on ITV1, with the first elimination episode on Sunday at 7.30pm.
> X Factor Top 16 - did the judges get it right?
See the pictures of the final 16 below: