Sir Elton John is suing US tax authorities in Georgia, claiming they have overvalued his Atlanta penthouse condominium.

Elton's tax consultant believes the $4.6 million estimate made by the tax office is $900,000 too much, and if this is true, the singer would pay $16,000 less per year in taxes.

It is the principle of the matter and not the financial problems that have spurred Elton to press charges: "I just don't see how the county can justify that number," said Craig Klayman, John's tax consultant. "It's just too high looking at what everybody else is valued at."