I think the thing with Beyonc? is she almost always takes an unknown a artist's work, and she won't say a thing about it being inspired by someone else. So when it come out, it looks like she was passing it off as her own unique concept.
Chris Brown talks about being inspired by MJ in almost every interview. He gives a lot of credit to MJ for inspiring him. Lady Gaga gives credit to Madonna. Beyonc? usually doesn't do that.
And this Asian girl assaulting the car is not the best example. We've all seen Beyonc? take entire dance routines and entire performance scenes and concepts from lesser known acts.