She thinks she's white. She won't wear any of the Juicy Couture clothes I got her.
Is this a racist comment or an ignorant mistake?
It's not a mistake, that's how she dresses.
Thinking black people all dress a certain way, or should dress a certain way, is an ignorant assumption. Just because she has her own sense of style does not mean she thinks she is white and she should be supported in her choices.