The 'Hey Brother' star - whose real name is Tim Bergling- has also recorded a reggae duet with Wyclef Jean and Matisyahu and another track with System Of A Down's Serj Tankian for the forthcoming follow-up to his debut record 'True'.
He said: ''It's going to be a lot more song-oriented. 'True' was an attempt at that, getting electronic music in a song format.''
While the 24-year-old producer is thrilled with the reggae track, he admits he ''doesn't know'' whether to use it yet.
He told Rolling Stone magazine: ''I love it, but I don't know what to do with it yet.''
The 'Wake Me Up' hitmaker grew close to Coldplay frontman Chris when he co-produced the group's track 'A Sky Full of Stars', and though they have a strong bond, they take different approaches to working.
He explained: ''Chris has been like a brother. He needs every part to be perfect. I'm not like that. Which is why I've got 70 songs.''
The as-yet untitled album is expected to be released later this year.
The singer introduced "the next generation" in Iceland.
Jack Antonoff hears a ''female voice'' in his head when he writes music.
The show will be seen by everybody at the same time.
The Scottish comedian has been speaking about gaining a knighthood in the Queen's Birthday Honours List.