The judges always have help from a celebrity friend in choosing their finalists and this year is no different!

Gary Barlow will be with the groups in New York and has enlisted the help of former contestant Olly Murs.

Yesterday Olly posted on his Facebook page: “I can confirm that YES I will be Gary Barlow’s guest judge on this year’s X Factor next weekend.

“Very proud moment for me going full circle from contestant to judge.”

Nicole Scherzinger and the girls will be in Antigua with none other than R&B superstar Mary J Blige.

The former Pussycat Doll posted a picture of her and Nicole in Antigua on Instagram, with the caption: “Just had an amazing day w/@BrooklynBlige for my X Factor judges houses in Antigua. I love you Mary thank you so much #QueenMJB”.

The boys and Louis Walsh will be in St. Tropez along with Nicole Appleton. Louis has reportedly banned the boys from singing Oasis songs so they don’t upset Nicole after she and Liam Gallagher spit earlier this year.

And Sharon will be joined by Robbie Williams at her home in LA with the Over-25 category.

It’s not Robbie’s first time being a guest judge on the show, in 2011 he joined Gary Barlow and the boys, also in LA.