Sam Callahan was a contestant on the British version of X-Factor in 2013. Back then, he was a shy little twink with an impressive voice. How things have changed…

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Sam Callahan
Photos: Instagram

These days, Sam is a muscled-up hunk, with impressive abs. But his backside is just as impressive, as you can see from a photo he uploaded to Instagram during the weekend.

Of course, we only get to see his bare ass, while the rest of London, it would seem, gets to see everything else:

https://www.instagram.com/p/BK_cpjvhJFS/?taken-by=itssamcallahan

And there’s the front side:

https://www.instagram.com/p/BKv_4IcBL3O/?taken-by=itssamcallahan

And yes, that was him 3 years ago:

And today:

https://www.instagram.com/p/BKa715WBthD/?taken-by=itssamcallahan

We’ll definitely keep an eye out!

h/t: The Gay UK