Tokyo is still the world's priciest city, followed by London, Moscow, Osaka and Hong Kong.

Quote Originally Posted by BBC News
It said it would set you back £1,950 a month in London to rent a luxury two-bedroom unfurnished apartment, compared with £840 in Dublin, £1,311 in Paris and £908 in Rome.
Then and unhelpful and strange analysis from CNN :

The weak American dollar and strong European and Asian currencies helped make Tokyo and London the most expensive cities in the world, according to a survey released Monday.
Why ? Tokyo, HK and Osaka have been at the top for years, even when the US$ was much stronger. London has always been more expensive than any American city.

The rest of the top 20 remained fairly constant, although Paris; Vienna, Austria and Istanbul, Turkey made their first appearances so high in the rankings.
Sorry, couldn't help complaining about these CNN reporters in Atlanta, USA, Earth who find the need to specify that Vienna is in Austria and Istanbul in Turkey. I guess that if people have enough education to read the news, then they should know that.