CowParade

In 1998 artists of Zurich decorated and led cows to their first parade. The experience had such a great success that it was necessary to repeat it. For the last 7 years the CowParade has shaken the imagination of public in 24 different cities, including London, New-York, Tokyo, Stockholm, Vienna and Prague. This year the even will take place in Moscow.
All the artists and designers are welcome to decorate a cow. The cows to be painted are life-sized, plastic and white.
Painted cows will be located on the streets of Moscow in August - October of 2005. The winners will be sent to the Sotheby's auction. All the money will go to charity.
Here's the official international CowParade site.