Michael Jackson was working on two projects before his unexpected death, including an album of classical compositions.

The late singer had contacted composer David Michael Frank in May to help him with the project.

Frank said: "He had two demos of two pieces he'd written, but they weren't complete. For one of them, he had a whole section of it done in his head. He had not recorded it. He hummed it to me as I sat at the keyboard in his pool house and we figured out the chords - I guess this recording I made is the only copy that exists of this music."

He also revealed that Jackson had called him just weeks before his death to discuss the compositions, adding: "He mentioned more instrumental music of his he wanted to record, including one jazz piece. I hope one day his family will decide to record this music as a tribute and show the world the depth of his artistry."