Damien Hirst most famous work is that of a human skull, coverd with diamonds. The work was called 'for the love of god.' It cost him about 16 to 20 million to make, and he sold it for 99 million.
Some of his other works
http://cache.eb.com/eb/image?id=96974&rendTypeId=4
Away from the Flock, Divided (sold for 3.38 million)
This little piggy went to market, this little piggy stayed at home.
The Physical Impossibility of Death in the Mind of someone Living
Adam and Eve Under the Table
Sacred XVII
Love's Paradox
Superstition (made out of butterflies)
Our Father Who Art In Heaven (consisting of a sheep, a prayer book and a rosemary