Michael Jackson's entire back catalogue stolen by hackers
Singer's unreleased collaborations with will.i.am and Freddie Mercury have apparently both been stolen
Sony Music paid the late singer's estate over $250 million (£158 million) for the back catalogue in 2010 and released the first swathe of tracks from it at the end of that year with the posthumous album 'Michael'.
According to The Sunday Times, the tracks stolen include duets with Black Eyed Peas mainman will.i.am and Queen's late frontman Freddie Mercury.
A source told the paper: "Everything Sony purchased from the Michael Jackson estate was compromised. It caused them to check their systems and they found the breach. There was a degree of sophistication. Sony identified the weakness and plugged the gap."
Sony themselves have not commented on the leak or confirmed exact details of what was taken.
Jackson died at the age of 50 from an overdose of the anaesthetic propofol. Last November, his physician Dr Conrad Murray was convicted of his involuntary manslaughter and sentenced to four years in prison.
However, last month (February 23) it was reported that Murray was appealing his sentence and was claiming that Jackson was so concerned about his finances that he recklessly self-administered a fatal dose of the drug Propofol.