In celebration of being named as the final 12 acts left in the competition, the singers appear in a short clip dancing and lip-syncing to Psy's huge seller.
Rylan Clark, Ella Henderson and Carolynne Poole are among the acts who were chosen by the judges to reach the live shows.
Christopher Maloney (Overs), Adam Burridge (Boys), Amy Mottram (Girls) and Times Red (Groups) will also go up against each other in a public vote to decide who will join the 12 finalists as a wildcard act.
'Gangnam Style' topped the UK singles chart yesterday (September 30).
The X Factor continues with its first live show on Saturday, October 6 at 8pm on ITV.
Photo gallery - The X Factor final 12:
Copyright: THAMES TV/SYCO