Christiano Ronaldo has stripped down to nearly nothing in a new underwear campaign.

The soccer star has his own underwear line called CR7 and agreed to model for the spring/summer 2015 campaign.

Ronaldo is tanned and in great shape in all of the pictures and seems to be enjoying himself modeling.

"I love vibrant colours and underwear is a great way to experiment with different looks. The bright pink and red in the new collection and the bold patterns gives it a distinctive look for Spring/Summer," Ronaldo said, according to E! News.

Ronaldo is shown in various pictures doing some athletic poses. In one, he rests his arm on gymnastic rings while wearing a bright pair of red boxer briefs.

In another picture, Ronaldo is shown doing ab crunches in a gray and white pair of boxers.

"I like to make sure that the collection stands out! I'm really proud of it," Ronaldo said.

Fashion photographer Rankin shot the pictures of the soccer star in the CR7 underwear.

CR7 underwear can be purchased online by visiting cr7underwear.com.

Besides stripping down for his underwear shoot, Ronaldo also recently offered up some fitness tips to get others in as great shape as him.

-Set yourself goals. It will help to keep you focused and work towards something.

-Working with a training partner is a good way to add a bit of competitiveness and help push yourself. If you train with someone who is a similar level to you then you will help push each other.

- Proper sleep is really important for getting the most out of training. Sleep helps muscles recover which is really important.

-Warming up properly prevents injury.

He added some more tips:

-Mix it up. I recommend a combination of cardio (running and rowing) and weight training to ensure that workouts target all areas of the body and increase both strength and stamina. It also helps to keep it interesting.

-Fit in exercise wherever you can. You can do an abs workout in your bedroom when you wake up in the morning or before you go to bed. If you get into a routine then it makes it easier as it will become a habit.

-A good workout must be combined with a good diet.

-Make sure you stay hydrated

-Relax!

What do you think of Ronaldo's photo shoot and fitness tips? Leave us a comment below and let us know.

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