Guess The Celeb Hiking Topless For Christmas!

For most of us, Christmas is a time to break our diet and indulge in casseroles, pies, and whatever sugarplums are.

But when you’re in the type of shape this celeb stays in, even the holidays are a good time for a hike.

Related: Guess The Celeb Throwback Pic!

Technically, when you keep getting cast as a swimmer or a circus acrobat, we guess this kind of fitness routine is probably contractually obligated.

But is that mustache?? You’ll see what we mean (below).

You don’t need to make it to the top of the mountain to know it’s…

May your holidays be epic. 🎄#happyholidaysA post shared by Zac Efron (@zacefron) on Dec 25, 2017 at 2:54pm PST

Zac Efron!

You keep that hotness going, boy!

[Image via Instagram.]

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