Pretty sure when she said she was Nigerian she meant it in the same way Sukihanna (however you spell it) meant it, as in according to a DNA test she's Nigerian. As for her being colorist, its not surprising. I've been saying for years the majority of "colorism" I've seen in my life have came from women.
Women value light complexions more than the men they accuse of it..the lite ones see it as an advantage and make sure the dark ones know it.