The four-piece will perform a medley consisting of their number 2 hit 'Can We Dance' and their upcoming single 'Oh Cecilia (Breaking My Heart)'.
It will mark the first guest performance in Got To Dance history solely by an act not connected with the show.
Reigning champion Lukas McFarlane - who triumphed in the fourth series last year - will also return for a "celebratory" routine.
The final will feature nine hopefuls battling it out in front of an 6,000-strong audience at London's Earls Court to win the £25,000 grand prize.
Bitter Harvest, Boyband and Dance Illusion will compete from judge Ashley Banjo's team, while IMD, Kaine and Original Kidz represent Kimberly Wyatt.
Dan-I & Sia, Duplic8 and Unity Academy complete the line-up after triumphing in Adam Garcia's live show last night.
The live final of Got To Dance 2014 airs tomorrow at 6.30pm on Sky1 HD.