The former Wham! frontman sighed as judge John Perkins sentenced him at a London court, while his long-term partner Kenny Goss threw his head into his hands.

The singer was told he would serve four weeks in prison and spend the remainder on license under several conditions which include regularly reporting to the authorities.

Judge Perkins said he took into account the fact that Michael had checked into a clinic after the crash to seek help for anxiety, depression and insomnia, which had led him to depend on prescription drugs.

The 47-year-old performer was also banned from driving for five years and was ordered to pay a 1,250 British pound (1,930 USD) fine.

Michael's lawyer said his client found the prospect of putting other people's lives in danger "appalling", that he had tried to turn his life around since the incident, and had started writing songs again.

Police found the singer slumped at the wheel of his Range Rover in the early hours of July 4 after crashing into the front of a photographic shop in Hampstead.

Michael was arrested and taken to Hampstead police station where he was found to be carrying cannabis cigarettes.

A blood sample was taken and chemicals linked to cannabis were found in his system.

The star was previously banned from driving for two years in 2007 and sentenced to 100 hours community service when he admitted to driving when unfit due to drugs.

Laywers for Michael have so far declined to comment on the sentence.

Doug MacLaurin, Reuters