Watch: Ellie Goulding cover Shawn Mendes’ 'Mercy'.

Ellie Goulding is currently on a U.S. radio tour alongside Shawn Mendes and Niall Horan, and it seems that she too has become rather fond of Mendes, having taken to her Instagram to post a short a cappella cover of 'Mercy'.

Watch Ellie’s cover below, as well as a clip of Shawn and Niall singing 'Mercy' together...

 

All still fangirling

A video posted by elliegoulding (@elliegoulding) on Dec 12, 2016 at 8:38pm PST

 

@niallhoran is a lad

A video posted by Shawn Mendes (@shawnmendes) on Nov 20, 2016 at 10:45pm PST