Gary Farber learns that Madonna will only drink something called Kabbalah Water, which has magic healing powers. It's a simple, familiar scam. Start with something common and cheap, like water, and claim to have added all kinds of mystical properties to it, for which they will charge you extra. It costs the con artist nothing. This is classic mumbo-jumbo:

Yehuda Berg the son of the Kabbalah Centre's founder claims, "We charge the water with positive energy, so that it has healing powers."

"Positive energy" is just the kind of empty phrase these con-artists love. It sounds so good…but of course, there's no way to measure this "energy". The other thing the magic water scammers do is doctor up their claims with a lot of pseudoscientific jargon, as in this example from Clustered Water.

In the human body, there are two basic types of water (biological Water): Bound water and Cluster. Cluster or free water is able to move freely through the cell walls and is instrumental to transport nutrients, remove waste, and maintain proper communication between the cells. Bound water, on the other hand, is water that becomes physically bound to other molecular structures and is unable to move freely through the cell walls.

Pure, unadulterated bullshit. Another company, Penta Water, has been pulling the same crap, and James Randi's account of how he tried to pin these greased weasels down (Part 1 and Part 2) makes for good reading.

By the way, if you are a clustered water huckster, avoid chemists. They might just dismantle your claims on the spot, or put together a careful debunking of the whole concept, along with a description of the actual structure of water. Good science is always the enemy of lies.

Somehow, I suspect Madonna doesn't have many qualifications in chemistry.