Simon Cowell then quipped that she was “invested” in the act and added: “I mean she’s invested in the act, she likes the act.”
Them recently broke his silence on the rumours and admitted he finds Nicole “lovely and stunning, talented and amazing”.
He told The Mail: “She’s stunning. And has [romance] crossed my mind? Yes. But we don’t have much time.
“We are working on choreography, vocal lessons, and it’s all so full on. So there’s not a lot of time for much else.”
The X Factor: Celebrity continues next Saturday at 7.10pm on ITV.