constant Sam Callahan won our hearts when he appeared on the show in 2013, and he's still impressing us three years later.
He's been working not just on his singing career, but on his body too since we last saw him on X Factor
But the former Essex barman decided to welcome London in the best way possible; with a nude Instagram snap.
Callahan took to Instagram to share the image and wrote, "Hello London".
Suffice to say, we're impressed.
Callahan recently released his new single 'I Love It When You' and is said to be working on his debut album.
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