Michael Buble married Luisana Lopilato in March 2011

Michael Bublé believes that marijuana has helped him writes hit tunes.

A Class B illegal drug in the UK, the drug can have a hallucinogenic effect.

'Marijuana can be very useful in the studio,' says Michael, 36.

'I never wrote a song without a bit of a smoke.

'It helps me create something good.'

But Michael admits model wife Luisana Lopilato, 24, doesn't agree with him - and she made her feelings clear on a recent trip to Holland.

'My wife hates the hash fumes,' he tells The People.

'Each time we passed a coffee shop I took a deep breath while she was disgusted.'

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