Madonna spends $10,000 a month on specially blessed Kabbalah water.
The 'Like A Virgin' singer reportedly can't get enough of the $5-a-bottle beverage, and makes sure she always has a regular supply to hand.
A source close to the singer told America's In Touch Weekly magazine: "Madonna drinks a lot of water - that's one of her fitness secrets. And Kabbalah water is the only stuff she will touch.
"She also makes sure she always has some to hand, and has it regularly shipped to wherever in the world she is staying at the time."
A description of the blessed water on kabbalahwater.com reads: "The Kabbalistic blessings and meditations that are used to create Kabbalah Water bring about elegant and balanced crystalline structures in water, while negative consciousness has an opposite effect.
"This is hugely important. In a very literal way, Kabbalah Water is life's original blueprint information brought into the modern world."
Some leaders from the Kabbalah Centre are said to have claimed the water has the power to cure diseases including cancer and AIDS.
Madonna has been a devout follower of Kabbalah, a mystical off-shoot of Judaism, since the late 90s.
In 2006, it was revealed the 49-year-old singer - who has a seven-year-old son, Rocco, and two-year-old adopted son, David, with husband Guy Ritchie, and an 11-year-old daughter, Lourdes, from a previous relationship - had spent $2.4 million promoting the faith around the world in the previous four years.
Madonna and hubby Guy Ritchie are rumored to not only sleep in different beds - but separate floors altogether!