Robbie Williams once smoked a lump of rubber after mistaking it for cannabis. The reclusive star - who also claims he can roll a joint, a cigarette containing marijuana, with one hand while driving - admits he was duped by a drug dealer, but decided to try it anyway.
He said: "Once I bought a lump of resin and it was rubber from someone's shoe, so I smoked it anyway."
"I could do the whole process of rolling a spliff in one hand in a car while it was moving. It was the only Scout badge I ever wanted."
The "Angels" singer - who is an avid believer in the existence of aliens - recently revealed a bad experience with LSD made him want to stab himself.
Robbie, who was just 16 when he tried acid, said: "American footballs were coming out of the TV. So I decided to go downstairs and stab myself. Mum came out of her room and said, 'What are you doing?'"
"I said, 'I'm just going downstairs to stab myself - do you want a cup of tea?'"
The 34-year-old has been admitted to rehab twice, the last time shortly before his 33rd birthday in 2007, when he was admitted to a treatment facility in the U.S. for a dependency on prescription drugs.
