With Cheryl Fernandez-Versini having whittled the girls down to six on Friday night, the next categories to be filled was the over 25s and the boys.
First to take to the mic was Jake Quickenden, who impressed the panel of judges in both his room and live auditions.
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Jack Quickenden impressed in this performance
"I like your commitment when you sing," said Mel B as the crowd cheered his performance of Christina Perri's A Thousand Years before she gave him the first seat on the stage.
Danny Dearden was then given the second seat, following his vocal performance of Brownstone's If You Love Me.
"Killer song, killer vocals and a slam-dunk of a performance," praised the Leeds-born singer.
As Geoff Mull took the third seat, U.S airforce officer, Charlie Martinez took the fourth slot after his performance of the Backstreet Boys' I Want It That Way.
Charlie Martinez took a seat on the stage
Hoping to wow the panel of judges, arcade attendant, Charlie Brown took to the mic, wowing with Ed Sheeran's Give Me Love.
"Take that seat,” said Mel B as the 23-year-old took the final seat on the stage.
17-year-old, Jack Walton then took to perform with a modern take on Chaka Khan’s Ain’t Nobody.
"If you own this, I might have to switch somebody out," warned Mel B before the crowd clapped along to his rendition of the 80s hit.
Mel B then surprisingly swapped Jack for Charlie Martinez, as Wembley arena booed her decision.
With the tension rising, Hayden Leeman walked onto the stage, prepared to fight for a place at judges' houses with a performance of Joan Jett’s I Love Rock and Roll.
Hayden Leeman wowed with his vocal performance
"I like you…you’re different. But that wasn’t a great performance," said Simon while Mel disagreed and deliberated who to swap the student for. In the end, she decided to swap him for Charlie Brown.
Next to the stage was Italian student, Andrea Faustini, who sang Whitney Houston’s I Didn’t Know My Own Strength.
“I felt every single word you said. You meant it." praised Cheryl as she broke down into tears, before Simon called his performance a “stunning vocal.”
As the crowd chanted "swap" Mel B had the tough decision to swap the singer for Hayden.
Last to take to the stage was pub singer, Paul Akister, who was kicked out of Louis Walsh’s judges’ houses last year.
Paul Akister was sent home from judges' houses last year
Following his performance of Otis Redding's These Arms Of Mine, Mel B was blown away and swapped Geoff’s place for Paul.
With Mel having chosen her six acts to take to judges’ houses, next to choose their category’s fate was Simon Cowell.
First to take a seat on the stage was Kisela Berice, whose performance of Michael Jackson's Man In The Mirror impressed the music mogul.
With nerves building, Scarlett Quinn took to the stage and forgot the words to Duran Duran’s Ordinary World in front of the 5,000 strong crowd and, as a result, was sent home.
Waiting back stage, Ben Haenow was next to audition for the second chair on the stage with his rendition of the Eagles’ Hotel California.
Ben Haenow impressed the 5,000 strong crowdOozing confidence, the van driver stunned the crowd with his gritty voice and was immediately given a seat with Kisela.
Next to the stage was 31-year-old, Raign, who opted to sing Chris Isaak’s Wicked Game.
"I just found it all a bit strange," commented Mel as Simon described the songwriter as ‘marmite’- “you either love it or you hate it,” before giving her the third seat on the stage.
“I’m literally allergic to her,” joked Cheryl, unimpressed with Simon’s decision.
Stevie Ritchie then danced the way through his performance of Dirty Dancing’s I’ve Had The Time Of My Life, before picking up a girl from the audience to dance with him.
Stevie Ritchie's dance moves stunned the judges
"My heart is saying you get another shot," said Simon before giving him the fourth seat on the stage.
Hoping to take the fifth seat was Janet Grogan. With her performance of Beyonce’s Crazy In Love, she sailed through to take the fifth seat.
Taking the sixth seat was Twilight actor, Robert Pattinson’s sister Lizzy Pattinson, following her performance of Chris Isaak’s Wicked Game- the same song choice as Raign.
"You sang it better," revealed Mel B, before Lizzy took the final empty seat.
Next to audition was ex navy officer, Jay James, who gave an emotional performance of Leona Lewis’ Run.“You deserve a seat,” said Mel B before Simon said that he deserved a place in the six seat line up.
Jay James was given a seat on stage
The episode ended of a cliff-hanger, as we await to know who Jay will replace in the six seat line-up.
Tune in on ITV tomorrow at 8pm to find out the result.