SiCo: Beyoncé X Factor USA Rumours Are "Nonsense"
Cowell also ruled out Mariah, stating the show doesn't need A-listers...
However, during an interview with Pussycat Dolls singer said: "I had a wonderful experience on the show. I loved being a part of my X Factor family.
"Nothing could obviously prepare me for everything I had to go through, all the emotions and stuff, but I have no regrets. I've always believed in never looking back and just moving forward and I've got an amazing year to look forward to.
"What happened? Well, all I know is that I gave 110% to that show. I know everybody's talking about it, they're saying good, bad, they love me or hate me, but the one thing you can't say is that I didn't give it my all."
Unlike Nicole, ex-Def Jam boss L.A. Reid survived The X Factor USA shake-up and will return alongside SiCo for this year's series of the Fox show.