The X Factor contestant Relley Clarke has compared auditioning in front of Gary Barlow with being sent to the headmaster’s office.

The 23-year-old singer – who’s through to the judges’ houses round with girls’ mentor Nicole Scherzinger – thinks the Take That singer is like a strict teacher.

Relley said: “No one could take over from Simon [Cowell], but Gary is a perfectionist, so he’s always listening out for bum notes, vocals. It’s quite nerve-wracking singing in front of Gary at times, he reminds me of a school teacher! It’s like going to the teacher’s office and you go ‘Oh, what have I done now?’

“You can always tell if you’ve done something wrong – just look at Gary!

“But he’s very professional so I rate him for that.”

Meanwhile, Relley revealed Nicole was a fun X Factor judge. “Nicole is lovely, she’s stylish, she’s hot, she’s fierce. She’s the best mentor for the girls.

“She’s very ballsy. When it comes to the crunch and it comes down to business, everyone knows what time it is and she lets us all know that she’s not playing.

“But she has got a fun side and she’s a bundle joy.

“She’s very witty, and I think the girls all really like that and we all connect because of that.”