Her case is interesting. She is obviously white. That's not even any debate. As you can see from the picture. I believe she grew up wanting to be something different from others. Her white complexion is boring to her. Dark skin tone is a fantasy to her. Plus as a businesswoman (Musician), it would help her to reach more diverse backgrounds. Great marketing 😉 Either one of these two are possibilities. Or both. This is also same with dark skin toned people wanting to be lighter skin toned or White. This is a fantasy. Everyone wants something different from what they have. Otherwise it gets boring. This is basically the reason behind this phenomena. There's nothing complicated about this.