Alesha Dixon, 38, will step in for Scherzy, also 38, for this weekend's Manchester auditions after a diary clash meant that she had to pull out.
"Alesha is guest-judging for the first day of the Manchester auditions as Nicole is unable to film that day due to a previous diary commitment," an X Factor representative told Metro.
Meanwhile, an insider revealed that they were looking forward to welcoming Alesha on to the ITV talent show, even if it is just for a temporary placement.
They told The Sun: "Everyone is gutted that Nicole won't be joining them, but Alesha has a wealth of experience from her role in BGT and her own pop career - so will do a great job filling in."
Alesha Dixon will fill in for Nicole for the early Manchester auditions
Prior engagements have meant that Nicole will miss some auditions
I have to say the vibe of Britain's Got Talent is second to none
Although she is standing in for the former Pussycat Doll, it seems unlikely that she will be adopting a more permanent role on the show.
Alesha previously told Digital Spy: "I'd be lying if I didn't say that in the past there's been times when I've considered if that would be good for me.
"But I have to say the vibe of Britain's Got Talent is second to none," the Mis-Teeq star revealed.
As the auditions kicked off earlier this week, it was revealed that the same line-up would be joining Nicole.
The X Factor line up will remain as last year's for the new season Sexy Nicole Scherzinger in pics Mon, June 19, 2017
Ex-pussycat doll and X Factor judge Nicole Scherzinger flaunts her fabulous figure.
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Nicole Scherzinger does splits as she strips to bottom-baring bikini in sexy dance clip
Louis Walsh, Sharon Osbourne and Simon Cowell have all reprised their roles on the talent show, with an insider revealing that the music mogul was keen to keep everyone on board.
The source said: "The chemistry was perfect last year, so it's only natural to want to bring the same line-up together again.
"It's usually hard to get people's schedules to align but for the first year it has worked out. The judges can't wait to get started and have already been gossiping behind the scenes," they added.