Promoting her new autobiography, Tulisa insisted that no one could replace the Geordie performer on the series.
"That’s an awkward question because I was the person put there to replace Cheryl," Tulisa said. "Cheryl is Cheryl, no one can replace her, she is who she is and I’m me.
"I’m nothing like her, it’s not about replacing anyone, the X Factor has a different dynamic now."
Cheryl will be seen making a brief return to The X Factor this weekend as she joins Gary Barlow at judges' houses, helping the Take That star to whittle down the acts in the Overs category for the live shows.
Speaking to Marie Clare, Tulisa backed Cheryl to return to the panel full time, suggesting that the Girls Aloud star had become a "standard" part of the ITV1 series.
Tulisa added: "Cheryl had masses of success on the X Factor, why shouldn’t she come back?
"She’s always someone I think of when I think of the show, it’s almost standard that she comes back."