Frantic search is launched for missing X Factor contestant
The 26-year-old musician, who announced that he was homeless, made it through to the bootcamp stage of the competition with ease.
He said before his performance: "My current status at the moment is I am homeless. I’ve been homeless for about six years, on and off.
"Two nights out of every fortnight like I’ll stay somewhere like a friend’s house or something, but the rest of the time I’m kicking about on the street. I sleep in doorways, alleyways just trying to keep dry."
The humble contestant went on to explain that he was put into care at the age of 13 when his mum struggled to cope and admitted he felt like "a burden" on every foster family he stayed with.
But Robbie has now gone AWOL and the show's producers are frantically scouring the streets so he still has a chance to change his life around.
A show insider said: “He’s a fantastic artist and he blew everyone away at auditions.
“He doesn’t have a phone and the only point of contact was through a friend. Producers last spoke to him on Monday but they can no longer reach his friend and have no idea where he is. It’s a real worry.
“If he doesn’t get in touch by the end of next week, then he’d have to kiss goodbye to any part in the show, which would be a tragedy.”
The news comes as a shock because Robbie appeared to be an early front-runner to win the show and admitted it could be life-changing.
He told the judges: "I have always sung, I don’t think there is anything else in my life that I do with such passion.
"This competition is obviously a big thing, it could add the element of security, it could change my life, definitely."