Listen to an old/new Skrillex ft. Ellie Goulding collab

A new/old track collaboration between former couple Skrillex and Ellie Goulding has popped up on Soundcloud recently, have a listen: 

Here's what Skrillex himself had to say about it: 

That track was made in a hotel room 2 years ago...I almost forgot what it sounded like...thanks for droppn this beat @elliegoulding 😊

— SKREEEELAAXXZZXX (@Skrillex) February 17, 2014

Cool track, but I can understand why it didn't get an official release.