Hehe, that was a bit tongue-in-cheek (At least I resisted ‘Butt-Hill’ 
)
I remembered Mari’s partner Krista provided vocals for the Thank you very much, Justin collaboration we did some years ago-
They both feature with Mylo at the end the song at about 2:35 
I noticed on a forum screenshot at the time that there were 17’000 users.
A couple of years later, we’re pushing on 170’000! 