Natasha is wearing Valentino Haute Couture for the April cover of Vogue Russia photographed by Txema Yeste. (source)
Click here to view last year cover featuring Nadja Bender, here to view 2013 cover featuring Joan Smalls, here to view 2012 cover featuring Daphne Groeneveld, here for 2011 cover with Abbey Lee Kershaw, and here for 2010 cover with Naomi Campbell.