The Weeknd, "Dark Times" (2015)
A strange thing happens toward the end of the Weeknd's album Beauty Behind the Madness: Ed Sheeran sings. While you might have to suspend some disbelief to accept Ed as the tough guy he insists he is here, his soulful vocals and starkly reverbed electric guitar fit right in with the Weeknd's murky sonics. The song was written after a post-awards show party in Toronto that didn't wrap up till 5 a.m. – "So you can imagine how that night went," the Toronto singer quipped to MTV News, going on to call Sheeran "the fastest and most talented songwriter I've ever worked with, ever... If we stayed in the studio another week, we could've had a full album, maybe."