Arijit Singh's vocals have sold some of the most romantic ballads in modern Indian film. Lead actor Ranbir Kapoor channels heartbreak and healing alike in the Sufi-tinged title track to "Channa Mereya" (The Light of My Soul) from Ae Dil Hai Mushkil, and Shah Rukh Khan celebrates newfound love among deserts, ice floes, waterfalls, and rainbows in "Gerua" (Dilwale).