As the two reality shows prepare to do battle on Saturday nights, the Olympian branded his audition on the series a disaster.
Louis had performed for the shows panel, including Simon Cowell, in 2009, but was given the axe at bootcamp.
It saw him turn his attention away from singing and to gymnastics, where he picked up two medals at this year's London 2012 games.
Speaking at the launch of the show this week, Louis said: “I’m glad to put that behind me, it was a disaster.
“X Factor was shambolic, it was awful. This is a proper show. I don’t feel like a celebrity at all, so just to be invited to take part is fantastic.”
Meanwhile, Louis has admitted that he's rather competitive and is on the show to "go all the way".
The hunky pommel horse champ said: "I am a very competitive person and I definitely want to do well. Win is a big word, and if you say that then you put yourself under a lot of pressure. But I definitely want to go all the way."
Strictly kicks off Saturday night on BBC One at 6:30PM.