We hear sources close to Britney Spears have been calling major credit card companies and the star’s favorite Beverly Hills establishments to closely monitor her charges. Brit has been on a recent shopping binge, racking up $100,000 worth of charges in just a few days.

The singer has been spotted buying ”some weird sportswear collections on Home Shopping and QVC.”

“She better wise-up,” said another longtime aide. ”She is going through money like water going over Niagara Falls.”

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