Watch: Holly Humberstone and Ruel's Emotional Grim Reaper version of 'Scarlett'.

While Holly Humberstone and Ruel were both in Los Angeles at the same time recently, the duo hung out to perform an 'Emotional Grim Reaper' version of Humberstone's latest single, 'Scarlett'.

About the performance, Humberstone says: "Recorded a stripped back version of Scarlett with the icon Ruel at the Roxy in LA. Hope u love it x"

Watch the duet below...

P.S. Read our new Holly cover story here.