Well, to begin, Michael had vitiligo, a pigment disorder. He wasn't "white," or "light-skinned" --- he suffered from a medical disorder. No black person would say Michael was "light-skinned," not in the sense of being born with light-colored skin.
Oprah is not "light-skinned," not by any stretch of definition:
Alicia Keys is light-skinned:
So is DeBarge:
For these elite black folks, it's skin color and blood color. One feeds into the other, reinforcing this stupid habit of colorism.
Forget the skin condition-—MJ wore WHITE make-up.
......Michael had vitiligo, a pigment disorder. .....
Get real, he was sujected to repeated prolonged dose or submersion to extremely strong whitening agents. The disease you mentioned is a smokescreen to cover his real treatments. It’s called plausable deniability
http://www.npgandour.com/english/fichiers/soinscorps/bioclair.html
The active ingredient of these cremes manufactured and widely sold in Africa is the chemical hydroquinone. In America the FDA limits the compound strength to 2% but mothing prevents a quack, or perhaps a Swiss quack, from purchasing easily available hydroquinine and mixing his own. This wiuld be especially true if a vanity obsessed man with zillions offered eonugh money.
Give me a break. Why did he have plastic surgery tomake himself look white? Why did he use white men's sperm and white women to have his WHITE kids. He wanted nothing to do with being black. Michelle wants to be white so bad she can taste it. 
I never saw any pictures of Michael Jackson that showed any evidence of vitiglio, and I remember him from his very first appearances with his brothers and their singing group. Of course, he could have been made up quite a bit to cover it, but I often wondered if he just said that he had it, and used it as an excuse for his lightening his skin. I don't think it had anything to do with his nose jobs.
I always felt sorry for him, because it seemed he suffered from a terrible self-image, and went through so much mutilation to make himself 'better'.