Shocking footage has emerged of the moment Michael Jackson's hair caught alight as he filmed a Pepsi advert, and the media speculates that this is the beginning of Michael's deadly dependency with painkillers.

The previously unseen images show the moment a pyrotechnic stunt went badly wrong.

Jackson's scalp was severely burnt and he was prescribed painkillers to treat his agonising injuries - leading to an addiction he never managed to kick.

The footage, which surfaced on Us magazine in the U.S., was filmed in Los Angeles on January 27, 1984.

Three thousand fans watched as a firework display erupted behind the superstar, showering him in sparks and setting light to his hair.

When he received the burns 25 years ago Jackson was at the height of his career, but the accident had disastrous consequences.

To relieve the second and third-degree burns on his scalp and body, and later to help him tolerate multiple surgeries on the scorched spot on his head, Jackson was prescribed several medications.

The website TMZ, which broke the news of Jackson's death, reports that the initial police investigation pinpointed the anesthesic Propofol as the primary cause of death.

Vials of Propofol were found in Jackson's home after he died.

The website also revealed that the 50-year-old's death is now being treated as homicide by LA police.

Source: MJ [DailyMail]