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Calvin Harris may be a model for Emporio Armani underwear, but the 31-year-old wasn't always so, well, ripped!
The DJ shared a throwback photo from 2002, joking that he looked "f--king fantastic" in the dated pic. Even he knows he's aged EXTREMELY well!
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But Taylor Swift's boyfriend isn't the only celeb who's improved since becoming famous. Scroll down to see more remarkable transformations!