the first time i heard of Oliver Tree was, when it came in the news that he perished

[hitlersblackedwaifu]

Yes I heard of it too. In fact, Ruud said "he makes good music" and posted that song in another thread years ago.

I wonder what his involvement in that song was, the shitty vocals? 

Any producer can turn any vocals into whatever they want through tuning and FX layering. 

So, hardly his song. Sorry again, ik he just died but I have to be honest.