The X Factor sensation, who is rumoured not to be returning to judge next year, apparently left hunky Matt Linnen almost unable to rehearse the following day after the messy drinks-filled evening.
Sources told The Sun that Matt, 28, is said to have a crush on his mentor – and the drinking session angered security staff at the studio.
“Nicole hosted a bit of a party after the show last weekend and she and Matt ended up staying till very late drinking,” a source told the publication.
“They get on really well and are pretty flirty with each other, though obviously it’s all innocent as Nicole is still seeing her boyfriend.
“The next day Matt was really feeling it and could barely manage rehearsals.
“The antics didn’t go down well with some of the staff at the studios who wanted to lock up and go home.”
Rai-Elle Williams looks optimistic as she leaves the London mansion [Wenn]
Nicole, 39, has been with tennis ace Grigor Dimitrov, 26, for years.
The party comes after speculation that Matt spent the night with 19-year-old fellow contestant Grace Davies.
According to reports, Matt Linnen and Grace Davies have been having a secret fling while staying at the show’s mansion.
“Matt and Grace have already slept together,” an insider told the Daily Star Online. “Everyone is super horny in the house this year.”
But it seems as though nothing much has happened between them since.
“Matt and Grace aren’t dating – it was basically just for fun,” they continued.
“They now act as if nothing has happened.”