The covers were shot by Alvaro Beamud Cortes. (source)
Click here to view last year covers featuring Amanda Wellsh, here to view 2014 cover featuring Isabeli Fontana, here to view 2013 cover featuring Mirte Maas, here to view 2012 cover featuring Karolina Kurkova, here for 2011 cover with Kim Noorda, and here for 2010 cover with Tanya Dziahileva.