From the bbc website...
Hundreds of Paris Hilton albums have been tampered with in the latest stunt by "guerrilla artist" Banksy.
Banksy has replaced Hilton's CD with his own remixes and given them titles such as Why am I Famous?, What Have I Done? and What Am I For?
He has also changed pictures of her on the CD sleeve to show the US socialite topless and with a dog's head.
There is even a YouTube video of the operation in progress.
You can see more of the elusive Banksies work on his website. I particularly like his paintings where he takes classic landscapes and adds in modern day objects - such as this one, and this one.