The Geordie singer was famously dropped from Simon Cowell's record label shortly after winning the show, but will make his comeback as part of the 10th anniversary celebrations this weekend.
As part of Saturday's show, this year's finalists will be singing the songs of previous contestants, and Joe offered up his help to Nicholas as he prepares to take on his winner's song, 'The Climb'.
Earlier in the week, 2006 winner Leona Lewis returned to help out Sam Bailey, who will be singing her smash hit single 'Bleeding Love'.
Leona tweeted a picture of the two of them together, writing: "Had a little visit with this lovely lady today @SamBaileyREAL."
Meanwhile, Hannah Barrett will take on Alexandra Burke's winning single 'Hallelujah', Luke Friend will sing One Direction's hit 'What Makes You Beautiful', Tamera Foster will cover James Arthur's 'Impossible' and Rough Copy will cover En Vogue's 'Don't Let Go', which Little Mix performed twice on the show back in 2011.
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