Sam Smith has recorded a special version of his single "Lay Me Down" with John Legend, and it's pretty spectacular.

The track, recorded earlier this year, will support Comic Relief and is the event's official single Red Nose Day this Friday.

The two will perform it live on Comic Relief: Face the Funny on Friday in London.

Smith said: "I recently visited a Comic Relief-funded project in my hometown which supports the young LGBT community in London. I’m extremely proud that my single will help raise money for projects like this and many others in the UK and across Africa."

Also, the single just went on sale, and is now available for download.

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