Her appropriative Dia De Los Muertos sugar skull costume, which she randomly mixed with a bunch of other unrelated symbolism
Her pretty much constant appropriation of twerking (before you make some ignorant comment, yes twerking is an actual art form/form of dance, and it has deep historical and cultural roots an white people doing it is absolutely cultural appropriation (more info on twerking’s roots in African dance here)
Repeatedlyusing (and again) (Those are 3 different links, folks) little people as props. One of her former backup dancers said of the experience, “Standing on that stage, in that costume was one of the most degrading things I felt like I could ever do” and “I was being stared and laughed at for all of the wrong reasons. I was being looked at as a prop…as something less than human.” and “For the first time I felt truly ashamed of being a little person. We were being used simply because we were little. It felt like society still saw us as a joke, despite the fact there is literally nothing different about me other than the fact I am small”. You can read her full essay here.