The trio - mentored by Take That's Gary Barlow - performed 'End of the Road' by Boyz II Men in a sing-off with 17-year-old Luke. Their choice of song turned out to be prophetic, however.
Rough Copy and Luke Friend faced the final sing-off
Gary voted for his own act to stay in the ITV competition, as did Friend's mentor Louis Walsh.
Pussycat Doll Nicole Scherzinger decided she wanted Rough Copy in the final, but when Sharon Osbourne voted for Friend following his rendition of current number one 'Somewhere Only We Know', the decision was taken to deadlock and it was revealed the group had lost the public vote.
WATCH them perform their 'save me' songs below...
Singer Joey James was in tears as he thanked everyone who had supported the band, saying: "Just being here has been a highlight."
Show host Dermot O'Leary described the band as "three of the greatest showmen this show has ever seen", while Gary said he was "so proud" of his act.
Luke dropped to his knees when he found out he would be joining Nicholas, also 17, and mother-of-two Sam Bailey, representing the over-25s category, to compete to be the 10th winner of 'The X Factor'.
Luke, Sam and Nicholas will compete in the final next week
Former 'X Factor' champion Leona Lewis and crooner Michael Buble took to the stage during tonight's semi-final, which also featured a group performance of 'Signed, Sealed, Delivered I'm Yours' by the remaining four contestants.
Special guests confirmed for the final at Wembley Arena include Sir Elton John, The Killers, Katy Perry and Tom Odell.
The winner's single will be released shortly after the final, with profits being split between Great Ormond Street Hospital and children's charity Together for Short Lives.