Three out of four of the finalists hoping to be the new star of the stage are Dubliners, who said they have massive support in the capital city.
East Wall's Jessica Cervi (19) said that local children have decked out the neighbourhood to spur her on.
"They've put up bunting around and, when I came home the other night, the kids had lit candles and put them all around my house," she said.
Sarah O'Connor's Lucan neighbours are thrilled to lay claim to another reality TV show star after the success enjoyed by Jedward.
"They used to say that Dublin people don't vote in these kind of shows, but that's clearly not the case," Sarah said. "They have been great at running campaigns and got me out of a few sticky situations."
Sarah (20) said that she is "over the moon" that she has got this far, but that all of the contestants are exhausted.
"I'm past tired, I'm running on empty," she said. "It's pure adrenaline now. It's constantly go, go, go. I haven't had one day off but I wouldn't have it any other way. I'm starting to get nervous now, the nerves really kick in on Saturday night."
Although the lead female character, Serena, is guaranteed to be a Dubliner, Ben Morris from Tallaght is the only male Dub in the running for the role of Nick.
Ben (23), who was actively involved in the HSE Community Games as a teenager and was once selected as a member of the Irish Swim Team Junior Squad, goes head to head with Sean Carey (19) from Meath.
Jessica explained that the other contestants will return for the ultimate performances on Sunday evening and the finalists have been busily rehearsing a number of songs for the last show.
"It has been such a huge part of my life, I'm really going to miss it," she said. "I'm really am exhausted. We've just been going constantly since February."
Former Westlife member Brian McFadden's sister Susan and former Hear'Say member Noel Sullivan will perform duets with the four finalists on the extravaganza.
The live show is broadcast on RTE One at 6.30pm to 7.30pm, followed by the results show at 8.30pm.