Madonna has been spending her time on the London social scene bad-mouthing Britney Spears for her failure to listen to reason-and to embrace Kabbalah.

“Madonna’s so over her,” says one Star insider. While the Material Girl has been a tireless advocate for AIDS causes and African relief, “she thinks Brit is being selfish,” says the source. “She wishes she wouldn’t waste her energy like she has. Instead, she thinks Brit should use her power for a better cause - to make a difference in the world.”

Madonna is reportedly peeved that Brit wouldn’t attend any Kabbalah meetings.

Britney has been ignoring all authority figures lately, another source tells Star, “and that includes Madonna. Britney only wants to listen to people who are her age because she thinks they understand her better. How can Britney relate to her?”