Justin Bieber strips down for Calvin Klein.

The pop star shows off his toned physique in Calvin Klein's newest ads for their underwear and jean lines.

The platinum singer provides the soundtrack for the commercials by playing a drum solo and speaks only two words.

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Dutch supermodel Lara Stone is paired with Bieber for the campaign.

The Canadian says being a part of the campaign is the beginning of a very exciting year.

SOUNDBITE: Justin Bieber, singer, saying (English):

"To be the next Calvin Klein underwear jeans model for me was the next step really. I've been wearing Calvin Klein underwear for years. Kind of in hopes of being one day the Calvin Klein model, but never really like thinking it would come to reality. And now that it's here it's really a dream come true."

The fashion brand will take advantage of Bieber's social media reach by asking fans to post selfies of themselves in CK clothes with the hashtag "#mycalvins".