Britney Spears has reportedly checked herself back into rehab today for the third time this week. According to celebrity gossip sites, Spears will get 30-45 days of of inpatient treatment at an unknown facility.

According to canada.com, Spears quit her second rehab stint on Wednesday after she learned that her ex, Kevin Federline, was going to sue for immediate full custody of their two children.

The emergency court hearing that K-Fed and his lawyers called for today has been canceled. The rapper's attorneys had been scheduled to appear before a Los Angeles Superior Court judge to fast track the custody arrangements.

Reports claim that Federline has agreed not to get the courts involved if the pop princess completes her rehab program.

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