According to the article, "The singer has taken the Hebrew name Esther, and has been seen wearing a red thread on her wrist to ward off the evil eye."
Esther was the non-Jewish name of the heroine of the Purim story. Her Hebrew name was Hadassah. The name Esther is probably derived from the pagan godess, Ishtar.
And the article tells us, "Madonna was raised a Roman Catholic, but she has become a follower of Jewish mysticism in recent years, raising the ire of many Orthodox Jews who see the adoption of Kabbalah by non-Jewish pop figures as an abomination."
Why, oh why, do Jews insist on pushing non-Jews away if they support us, for any reason?