The singing competition is set to return to UTV this weekend, with Cheryl and Mel taking their places at the judges' desk alongside Simon Cowell and Louis Walsh.Mel B has previously served as a guest judge during past X Factor auditions and has been known to reduce one or two hopefuls to tears...But Cheryl thinks viewers are going to be very entertained by the former Spice Girls' critiques during the upcoming series."They are definitely not ready for this one," she told This Morning's Jeff Brazier, referring to her fellow panellist."But honestly, she's just direct, she says things I probably think but the words just get stuck, I can't get them out of my mouth."Mel added: "I'm just honest and I'm just me. I don't prep anything, what I see I just react to."After leaving The X Factor following the 2010 series, Cheryl is also marking her return to the show and admits it's "like she has never left".She said: "It felt right, I've always loved the show, I needed time off, that's for sure, but I was ready to come back and now that I am back it's like I've never been gone."Her return comes after she forgave X Factor boss Simon for unceremoniously sacking her from the US version of the show back in 2011.She told Jeff her return was also an attempt to get Simon to stop begging and grovelling."I wasn't something I had in the pipeline, but honestly I couldn't take any more of the begging from Cowell," she joked. "It was pretty intense.""So I thought "Let me just do you a favour..."The X Factor airs on UTV on Saturday and Sunday at 8pm.