Harry Styles, Zayn Malik, Niall Horan, Louis Tomlinson and Liam Payne said that both of this year's boy bands were "really great".
Harry told heatworld this week: "The boy bands are really good.
"I think its good that there are two boybands because a lot of the time I don’t really think they want to put two of them through. I think they are both really great and talented.”
And bandmate Louis Tomlinson added after meeting the finalists backstage: “They are such nice guys as well.”
One Direction appeared on the X Factor earlier this year as they joined Dermot O'Leary on stage during the first live show.
Niall Horan recalled: “It was weird watching it from our side now because when we walked out those doors for the first time it was the most nerve-wracking thing ever.”
And Louis added: “I couldn’t even watch it properly because I felt on the edge the whole time.”
The X Factor 2012 continues this Saturday and Sunday night on ITV1.
This weekend will see the remaining eleven finalists singing tracks with a Club Classics theme.