The pop superstar was so impressed with the British musician's latest album 'All Night Cinema' he called him to praise his songwriting skills.
The 33-year-old musician - real name Jack Allsopp - said: "He phoned me up and told me what his favourite songs were - 'The Day I Died' is one of them.
"You never get a warning when he calls - it's a withheld number. It's weird if I'm sitting with people, but he's a normal person when you meet him. He likes music, I like music - we always talk about music."
Meanwhile, the 'Starz in Their Eyez' hitmaker says he is thrilled the track has received mixed reviews amongst fans.
He told BBC Newsbeat: "I'm told it's uplifting and upsetting. It's great, there aren't many pop songs you can have a proper conversation or debate about.
"People have written small essays on YouTube deconstructing the video, they've left me baffled messages on Twitter - it's great. I wanted it to be a song people would react to.
"I'm very happy, I'm over the moon. It's a very unusual song, I'm not saying it's utterly original, but nothing sounds like it at the moment, so I'm chuffed."
The gory video stars British TV actor James Nesbitt as a man going about his normal life, and then dying.
Jack said: "James was so convincing, it was really impressive. You almost forgot he was acting and wanted to start helping him."
'The Day I Died' will be released on August 17.
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