The singer has apparently agreed to help his Take That bandmate Gary Barlow by mentoring his acts from his Los Angeles mansion during the judges’ houses stage.
Former judge Sharon Osbourne is said to have agreed to do the same for Louis Walsh, while ex-Destiny’s Child singer Michelle Williams is to help Kelly Rowland and Tinie Tempah will help N-Dubz star Tulisa from a villa in Ibiza.
A source told The Mirror: “Because of the judging reshuffle we knew it was important to bag some huge stars. Robbie and Michelle have been in two of the world’s biggest bands.”