Far from her newborn son, Alicia Keys collaborates with Sampha, who has just lost his mother. Together, they give a longing melody life.

In his quest to capture Aaron Burr's voice, Lin-Manuel Miranda finds his lines on the subway. Many breathless choruses later, can he relate to Burr?

No obvious chorus plus a lead mandolin and handclaps equals the least likely chart-topper of the '90s. R.E.M. looks back at the life-changing track.

Ty Dolla $ign pens a verse in minutes, picks up multiple instruments and brings in Kendrick Lamar and Brandy for this moving love song to his city.