N-Dubz singer Tulisa was a judge on the show for two years before leaving in 2013 to focus on other projects.
Tulisa led Little Mix to victory in 2011 and she mentored rising star Ella in 2012. Last week, Tulisa said a return to the ITV talent show is something she "would and could do".
Now speaking to Reveal at Capital FM's Jingle Bell Ball, Ella says: "Ooh, that would be exciting! I saw Tulisa the other night at the Cosmo Awards and she's doing really well, but I don't know [if she'll return].
Ella actually made her X Factor return last week, where she performed her latest single, 'Yours'.
"It was amazing to return to the show," she tells us. "It felt really nice and I felt prepared."
It's been a pretty incredible year for Ella, who achieved a Number One single with 'Ghost' and topped the album charts with Chapter One.
The songstress is now making a name for herself in the States, and her whirlwind year is set to continue, as she's been announced as the special guest on Take That's blockbuster arena tour in April next year.
Speaking about her success, Ella adds: "It's crazy and I'm excited to be doing what I'm doing. It's one thing saying I want to be a singer, but for me to travel the world through my music is another thing. It's been an incredible year so far and I can't wait for the new year to begin and to start 2015."
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Watch Ella's video for 'Yours' below: