Irina Shayk is topless in a new advertisement for Spanish shoe-making firm XTi. The 26-year-old is seen in only a pair of tiny white shorts, holding a pair of red flip flops over her chest to protect her modesty. In another publicity short for the brand, she can be seen kneeling on a chair, wearing a tiny pair of denim cut-offs and a short-sleeved shirt tied above the waist to reveal her trim stomach. The model has been dating Portuguese football player Cristiano Ronaldo, also 26, since early 2010.