This reminded me of the recent debate regarding Israel's Eurovision win (unbelievably I still haven't seen the clip or heard the song in its entirety, which shows how estranged I am from the culture of the country I inhabit). There was a short article about that on the fantastic Indian webzine thewire, which included the following picture from twitter:



Still, that doesn't address the question head on, because the examples you and the article gave were within the scope of this woman's definition of actual cultural appropriation. Here's an interesting contribution to the debate:
'Māori has gone mainstream': the resurgence of New Zealand's te reo language Positive views of Maori culture by whites seems to be actually helping Maori culture to rebound. (Though the one Maori I actually met, back in the 1990s, was telling me about cultural genocide).
I guess cultural appropriation is a rather complicated issue.