Michael Jackson blasted his famous family members in explosive recordings made for his 1988 autobiography - branding Jermaine a "womanizer" and Tito "boring".
The King Of Pop hits out at all of his Jackson 5 bandmate brothers - Jermaine and Tito, as well as Marlon and Jackie - claiming they were lazy and moaned during their time in the group, while he was always "watching and learning".
The revelations come from a series of taped interviews Jackson gave for his 1988 book Moonwalk - but insisted were never published at the time.
In the recordings, obtained by Britain's News of the World newspaper, Jackson is heard saying, "The brothers didn't give me support. We'd be working on a TV show or video and they'd be sitting around moaning and groaning but I'd be watching and learning.
"It takes a talent, but some people are lazy and don't want to develop anything."
He then hits out at his brothers one by one - calling Marlon "old-fashioned", branding Jackie "negative" and referring to Randy, who later joined the group, as "hard-headed" and "macho".
Jackson then takes aim at his sister La Toya, adding: "To me, she is Mrs Nice and Nasty."
The star admits he was unhappy when his younger sister Janet wed producer James DeBarge in 1984: "It kills me to see her off and married. We did everything together and were just alike. It's a terrible loss."
Jackson also hits out at his beloved mother Katherine for giving a tell-all interview about him when he was younger.
He says, "She disappointed me. She did an interview. I don't like her to talk. It's none of those people's business."
But the revelations never made it into the book, as Jackson told the tome's ghostwriter: "You can't print that."
Moonwalk is set to be re-released next month, following Jackson's death in June.
