Sam Smith wins Song of the Year Grammy for 'Stay with Me'

Sam Smith has won the Grammy Award for Song Of The Year for his hit single 'Stay With Me' (Darkchild Version).

The Brit singer has already won two 2015 Grammys for Best New Artist, Best Pop Vocal Album.

Smith faced tough competition from Meghan Trainor's 'All About That Bass', Hozier's 'Take Me To Church', Taylor Swift's 'Shake It Off' and Sia's 'Chandelier'.