Scottish singer Jade Richards auditioned again in Glasgow earlier this year, having been controversially axed by Kelly Rowland in last year's series.
And Joe Cox was also back, having been told by Gary Barlow last year he wasn't ready for the live shows.
It's the third time for some of the budding performers, and they'll no doubt be hoping this time they'll go all the way to the finals.
We were huge fans of both Melanie and Carolynne on the show last year, and will be keeping our fingers crossed they'll make it through this time!
Speaking to The Sun, a source said: “There are a lot of familiar faces but they all deserve to be here.
"Everyone will be thrilled to see Jade back. If she makes it to the live shows she’ll have loads of support."
This week's bootcamp saw 200 or so hopefuls whittled down to just a handful ahead of the judges' houses stage.
Those still remaining in the competition will find out who their mentor is very soon before jetting out across the world for one last audition.
The source added: “Alexandra [Burke] is living proof you can be second time lucky on the X Factor.”
[cat c="the x factor"]The X Factor 2012[/cat] hits screens on ITV1 later this summer.