Katherine Jackson's suffered a huge legal setback this past week in her wrongful death lawsuit  for her son Michael Jackson when a California court dismissed all of her claims against AEG and its President Tim Leiweke Breaking Celebrity News is exclusively reporting.

Additionally all but one of her claims against the remaining defendants were dismissed and the California Court of Appeals ordered Michael's medical records unsealed.

DOCUMENT: AEG Files With Court Of Appeal

Those remaining defendants have filed legal documents with the Court of Appeal in California to dismiss that one remaining claim on the question of whether AEG Live negligently hired Dr. Conrad Murray, Jackson's long time personal physician.  Murray was convicted in 2011 of the involuntary manslaughter death of Michael Jackson after administering a fatal dose of propofol to help the pop singer sleep. Murray hadn't signed formally signed his employment contract with AEG at the time of Jackson's death.

In response to the filing, the Court of Appeal indicated that it would be unsealing certain records of the late pop singer, including Jackson's medical records.

In court documents obtained by Breaking Celebrity News, AEG Live asserts, "absent this Court's immediate intervention, defendants will shortly begin a long trial based on the trial court's fundamental misapplication of California law. Plaintiffs seek more than $40 billion in damages from defendants arising from the 2009 death of pop music star Michael Jackson....On February 27, 2013, Respondent Court summarily adjudicated all of the Jackson's