There’s a new woman claiming to be one of MICHAEL JACKSON’S secret children.  And she’s the niece of MICHAEL’S good friend DIANA ROSS.

–Mocienne Petit Jackson claims that Michael conceived her with Diana’s sister Barbara back in 1975, when he was only 17.

–But she says that when she was 9-years-old, Katherine Jackson had her abducted and taken to Belgium so her existence couldn’t ruin Michael’s reputation.

–Oh, and all seven of the men who carried out her abduction were later MYSTERIOUSLY MURDERED.

–Mocienne . . . who currently lives in the Netherlands . . . wants a DNA test to prove she’s Michael’s daughter.  Obviously, she wants in on Michael’s inheritance.

–She also wants custody of Michael’s kids, so she can, quote, “give them a more normal life.”

–Oh . . . and there’s this:  Mocienne claims SHE has that skin condition, vitiligo, just like Michael did.