Smith posted another photo that really showed off his slim figure.

\"GLASGOW!! You ready? Im channelling zoolander tonight as you can see lol,\" he caption the skinny pic.

GLASGOW!! You ready? Im channelling zoolander tonight as you can see lol

A photo posted by Sam Smith (@samsmithworld) on Mar 17, 2015 at 1:26pm PDT

Smith also posted a photo from the gym, which must be instrumental in his physical transformation.

Gym is kicking my ass today

A photo posted by Sam Smith (@samsmithworld) on Mar 18, 2015 at 7:26am PDT

And here's a pic from last month:

ELLE Awards x Thank you so much @prada for dressing me tonight xx

A photo posted by Sam Smith (@samsmithworld) on Feb 24, 2015 at 12:24pm PST

And a childhood photo!

How about that time I picked my name out of a hat in primary school and had to collect a healthy eating award looking like THIS!! Hahahaha Vision of health hahahaha

A photo posted by Sam Smith (@samsmithworld) on Feb 20, 2015 at 10:09am PST

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