London, Sep 6 - Troubled English singer Pete Doherty has confessed he once took so much drugs that he thought he was an 'air hostess'.

The rocker began having the hallucinations after injecting horse tranquiliser ketamine while he was working on the band's 2007 album 'Shotter's Nation', reports fametastic.co.uk.

'Snorting is bad enough but injecting it is the equivalent of... well, there is no explanation. One minute you're a perfectly sane human being working on what should be an album you're proud of and committed to, the next you're an air hostess on an airplane bound for Portugal,' said Doherty.

The 30-year-old was dating British supermodel Kate Moss at the time and claims the incident was one of the reasons for their split.

'Imagine, there's millions of you inside a little tube which is going up a dog's ear. And your producer Stephen Street is carrying you from the toilets. And then your girlfriend turns up and starts shouting at Stephen Street, 'What's all this? What are you doing?' Stephen's like, 'Oh f***ing hell, we've got a vocal to do.' And I'm like, 'Do you want another drink?' Because I thought I was an air hostess,' he said.