Robbie Williams reckons Justin Bieber will eventually crash and burn.

The 'Candy' star is no stranger to personal torment under the pressures of fame, with the singer at one point struggling with drugs after going solo.

Speaking to The Sun, Williams believes that someone like Justin Bieber will succumb to constant negative attention and lose the desire to keep making music.

Referring to teen fame, the 'Take The Crown' man said: "There is a list longer than my arm of f***-ups."

He continued: "It's inevitable that someone like Justin Bieber will hit a hard time. You hear about everybody going, 'You're sh**'. And you go 'f***, I'm sh**, I'd better go and do something else'. And it gets to you."

Bieber meanwhile has had his own brush with drugs in recent weeks after being spotted allegedly smoking marijuana.

He made light of the rumours by mentioning the photo during a recent skit on Saturday Night Live.