In a recent Vanity Fair profile, the singer said she used the drug “maybe a couple of times a year”, but warned her fans not to take it.

However, Boy George – a recovering addict – said there was “no reason” for Lady Gaga to talk about the subject and that it seemed “out of character”.

“If Lady Gaga were about to be exposed as a drug user I would understand her recent confession to Vanity Fair that she is an 'occasional' coke sniffer,” he wrote in a blog for Paper magazine.

“But why offer up this information on a whim? Could it be that her use of coke is not so 'occasional'?”

He added: “My mum had the best take on this 'she's reached the stage where she feels untouchable, you all get there -- you did, son'. I can't argue with that!

“One has to wonder how much of a grip Gaga has on things. Up until now she has seemed almost annoyingly professional and focused and this seems out of character!

"Isn't saying your an 'occasional' drug taker a bit like saying you're bisexual? That usually means you're raving!”

Lady Gaga is currently on the North American leg of her Monster Ball world tour.

(by Jason Gregory)