WATCH: Sam Smith & John Legend duet

Two big voices combine on 'Lay Me Down', as Sam Smith and John Legend trade lines in aid of a great cause.
The crooners have re-recorded the track from Smith's In A Lonely Hour debut, and all proceeds will go to benefit Red Nose Day, taking place today. Check out the video below and purchase the track from usual online outlets if you want to help out. The pair will give a once-off performance of it this evening as part of the live Comic Relief – Face The Funny special in London (you can catch it on BBC 1 between 9pm and 10pm).