That's one way to celebrate!

Calvin Harris stripped down to his underwear on Instagram (again!) and showed off his impressive physique all to wish his manager a happy birthday.

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"I love u," he captioned the photo posing in his signature Emporio Armani boxer briefs.

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Happy birthday to my manager @gillespiemark I love u

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The British DJ turned fashion model has been enjoying his single life lately, even flaunting his abs in a Speedo earlier this summer with this boys.

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We said YES

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We have a feeling Taylor Swift is regretting her decision!