Scars to Your Beautiful is by a Canadian songwriter.
David Clayton-Thomas ( born David Henry Thomsett ; 13 September 1941 ) is a Grammy Award-winning Canadian musician , singer and songwriter , best known as the lead vocalist of the American band Blood , Sweat & Tears . `` Scars to Your Beautiful '' is a song by Canadian singer and songwriter Alessia Cara for her debut studio album , Know-It-All ( 2015 ) .