Mocienne Petit Jackson: Alleged Michael Jackson Love Child Surfaces

09/26/2010 05:12 am ET | Updated May 25, 2011

The alleged MJ spawn -- Mocienne Petit Jackson -- has filed documents with L.A. County Superior Court claiming she will surely be in line for a serious inheritance check ... if a judge will give the go-ahead on a DNA test.

Here's the story -- MPJ claims back in 1975, 17-year-old Michael Jackson secretly impregnated her mother Barbara ... who happens to be Diana Ross' sister.

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