Jo Meston Scott shot the cover. (source)
Click here to view last year cover featuring Ratner and Pasha Harulia, here to view 2017 cover featuring Anna Cleveland, here to view 2016 covers featuring Kriss Kulyk and Iana Godnia, here to view 2015 cover featuring Caroline Trentini, and here for 2014 cover with Suvi Koponen.