Green light to double the size after massive boom in popularity thanks to stars Celebrities including Madonna, Demi Moore and Gwyneth Paltrow turn to Kabbalah for spiritual guidance More than 1,000 students a week now attend classes at the Center in central London, moments from Oxford Circus Popularity has prompted ambitious expansion that will see area of the grand, Georgian building double in size Ever since Madonna began wearing a piece of red string around her wrist in the Nineties, Kabbalah - a mystical offshoot of Judaism - has attracted an impressive list of celebrity devotees. Actress Demi Moore and former husband Ashton Kutcher are Kabbalists, while there has been speculation that Gwyneth Paltrow's interest in Kabbalah hastened the end of her marriage to Chris Martin. And One Direction's Harry Styles is reported to be one of the most-recent A-list converts. Now the stars are set to have a new spiritual home. The Kabbalah Center, a grand, Georgian...