Irina Shayk plays shoe salesman for XTI’s Spring/Summer 2011 footwear campaign the only way she knows how, half-naked in the arms of a brawny male model.

But wait, this is about shoes. Ok, it’s really not.

Shayk, 25, has proved to be one of the more enduring female companions to soccer great Cristiano Ronaldo.

They met last year after at an Armani Exchange photo shoot.

She looks stunning in barely there outfits as she crawls all over her male hunk.

Incidentally, his name is Arthur Sales. But enough about him.

Check out Irina’s photos; click to enlarge!

Shayk wears three different style shoes, including knee-high leather boots.

The Russian-born model says she maintains her figure by working out but always includes something for herself, a spa massage.

“I work out four or five times a week with my trainer not because I want to be skinny, but because it just makes me feel good to start my day with a workout,” she explains.

Irina’s career has skyrocketed since she began dating Ronaldo, one of soccer’s hottest stars and one of the world’s most eligible bachelors.

Her career hit a milestone earlier this year, when she landed on the cover of the Sports Illustrated swimsuit issue.

“It’s one of the most important things that can happen to a model in her career. People now recognize me on the street,” she said in an interview about the coup.

“The cover has launched countless modeling careers. I did receive requests to be in movies, but I want to concentrate on my modeling.”

Irina is based in New York while Ronaldo is in Spain playing with Real Madrid.

Check out a video for the campaign. And, check out her photos.