During a closed-door hearing on Tuesday, lawyers for Spears’ conservators, her father Jamie Spears and lawyer Andrew Wallett, submitted an ex-parte petition, asking for the permission to receive the funds.
Ex-parte petitions aren't regularly scheduled and are considered to be an emergency.
According to documents obtained by RadarOnline.com, the judge approved the loan after reading declarations submitted in support of the bid.
But the filing does not specify what the loan is for and the petition remains under seal.
The mystery of the millions comes as her boyfriend, David Lucado, is getting ready to propose, a source said.
"He is extremely serious about Britney and this is the happiest she has been in a very long time,” the family insider revealed.
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"She wants to start a family with him and has expressed special interest in having a little girl. Britney’s parents love David and think they are a perfect match."
“Britney wants to get as much attention and money for pictures with her third wedding as she did for her second, which is why she is considering reaching out to Elvis’ daughter, Lisa Marie Presley, to ask if she can be married in the Graceland Estate in Memphis, Tennessee,” another source disclosed.
“Getting married at the home of the late king of rock and roll in an elegant Southern-style ceremony would certainly generate one-of-a-kind pictures that Brit already plans to make the front page of magazines around the world.”