Calvin Harris undoubtedly has a FIRE body with excellent muscle tone, but we're not sure why he disrobed down to his underwear to wish his manager Mark Gillespie a happy birthday.
Guess when you work out that much, you just HAVE to show it off at every opportunity, no matter how inappropriate.
Anyway, the DJ posted the photo to Instagram Tuesday and wrote:
"Happy birthday to my manager @gillespiemark I love u"
His fans weren't interested much in the birthday, though, as they were too busy drooling over Calvin's abs and bulge.
We kind of are, too — we can't lie.
[Image via Instagram.]