Former cruise singer Maloney was thrown a lifeline by the public after he was initially rejected for the finals, but has since sailed through to the climax of the show.
Over-28s mentor Gary Barlow had opted not to take him through to the live finals because of his nerves.
But viewers took a shine to the 34-year-old customer services manager from Liverpool and voted him through as the wildcard contestant.
Maloney had said he wanted to compete in X Factor for years but was always too nervous to apply, but eventually went for it with the encouragement of his grandmother Pat.
The Liverpudlian has become a controversial figure in the competition with many people considering him a touch on the cheesy side and he has received boos from the studio audience some weeks. Yet he has consistently managed to avoid finishing in the bottom, thanks to the apparent loyalty of the voting public.
The hostility in some quarters has even led to Maloney receiving death threats on Twitter.
In recognition of his nan's influence, he secured his place in the final with a well-received performance of Josh Groban's You Raise Me Up, which he dedicated to his grandmother.
Wags have lampooned him by circulating online a spoof album cover entitled Songs For Me Nan and there have been suggestions that is picking up votes to spite show boss Simon Cowell because he has the least chart appeal of the finalists.
Speaking this week as he made a homecoming visit to Liverpool, he said: "I feel like the only time I will ever prove my critics wrong is if I actually walk away and win the competition.
"But I've come this far and people have been picking up the phone and voting for me. It's just been overwhelming, I just feel so humbled."