Rudimental, "Lay It All On Me" (2015)
This U.K. band first collaborated with Sheeran on "Bloodstream," a track about an MDMA experience that appeared on his 2014 album, X. (Two members of Snow Patrol also helped craft the song – is there anyone Sheeran hasn't worked with?) When Rudimental was prepping their second album, he returned the favor, co-writing and singing this piano-driven groove. "This is my final thing I'm releasing for a while," Sheeran tweeted after the song came out. "Bad news if you like me, great news if you don't. We cater for everyone at SheeranCorp."