Irina Shayk: How "Sports Illustrated" Model Got Her Sexy Body

(CBS/AP) Five times. That's how many times Irina Shayk has been featured in Sports Illustrated's annual swimsuit issue.

It's also how many times the super-sexy, super-fit model works out each week.

"I do work out five times a week, but I'm never dieting," said the Russian-born 25-year-old. "I try to be healthy because to be happy and healthy on the inside shows on the outside."

In keeping with tradition, the cover of the special issue is kept secret until the magazine is ready to hit newsstands.

"There were 10 models there to do the Top 10 List, and nobody knows until the last minute who the cover will be," Shayk said. "And then I saw it, and I couldn't believe it."

Shayk, the girlfriend of soccer superstar Cristiano Ronaldo, said she liked the push-up bra style of the suit, in a design of pink diamonds on the front of the top with yellow around the neck and sides.

"I never get to see the photos when we take them, but I remembered the swimsuit," Shayk said.

She won't be the only one.