The “King of Pop” was more than $500 million in debt when he tragically died in 2009, RadarOnline.comhas learned. The shocking nine-figure amount was revealed in a petition filed June 21 by the executors of Michael Jackson’s estate in Los Angeles County Superior Court. The filing noted that Jackson died before kicking off his highly anticipated This is It concert tour in London, leaving his estate financially liable for $40 million to the tour promoter, AEG Live. Jackson owed money to more than 65 creditors when he passed away, the court docs stated, requesting that funds from the music icon’s…