The successful five contestants who will now form the band, called One True Voice, were Matt Johnson, Anton Gordon, Daniel Pearce, Jamie Shaw and Keith Semple.
The unlucky singer to be voted off the show and miss out on a place in the band in a live show on Saturday night was Chris Park.
The performers were whittled down from the thousands who took part in auditions in front of judges Geri Halliwell, Pete Waterman and Louis Walsh.
Music industry guru Waterman will be in charge of the group, who will be in a race to secure the Christmas number one spot with the show's girl band.
Their first single is expected to be a cover of the Bee Gees' song Sacred Trust.
Each of the final six sang live on Saturday's show in a last ditch bid to win over the public with their performances.
The public were then given the chance to vote for their favourite.
Chris Park, with the lowest number of votes, saw his dream of pop stardom slip away as he waved goodbye to the show.
Clash
Waterman had said he feared a personality clash between the remaining six performers could wreck the group's chances of long-term success.
"Five of the lads get on with each other and the other doesn't," he is reported as saying on the show's website.
"There is a personality clash - not just with one person, with everybody."
He declined to name the individual, saying that identifying him could lead to a sympathy vote among the public on Saturday.
The following week it will be the turn of the girls who will eventually be managed by Louis Walsh.
He is more used to managing acts such as Boyzone and Westlife, and he also manages Six, the winners of the Irish version of Popstars.