Rebbie Jackson, Michael's older sister and perhaps the lowest-profile Jackson sibling, is in mourning following the death of her husband, Nathaniel Brown.
Rebbie and Nathaniel wed in 1968 (!) and have three kids, Stacee, 40, Yashi, 35, and Austin, 27.
Jackson's son, Michael's nephew, posted on Twitter, "I love you Dad... Thank you for showing me unconditional love and the example of being a good person."