A security firm hired by Britney Spears' father monitored the pop singer's phone calls and text messages during the court-sanctioned conservatorship she has lived under since 2008, according to a New York Times documentary released on Friday.In Controlling Britney Spears, Alex Vlasov, a former Black Box Security employee who said he worked with the singer's team for nearly nine years, said the company had access to Spears' phone and installed a listening device in her bedroom.An attorney for Jamie Spears, who runs his daughter's conservatorship, didn't deny the surveillance but said it was 'well within the parameters of the authority conferred upon him by the court.' Under surveillance: A security firm hired by Britney Spears' father.
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