The music of the soundtrack has been composed by the maestro A.R Rahman. The album consists of songs from various genres ranging from soft romantic ballad like "Enna Sona", sung by Arijit Singh, to club type songs like "OK Jaanu"(title track). The soundtrack is definitely refreshing, but I feel somewhere it doesn’t connect to the audience well. Rahman has used many of his old compositions here. The songs could have been more melodic. Lyrics have been penned down by Gulzar, and they are really soothing to the ears. Probably, the best track of this album is "Enna Sona", which has been sung beautifully by Arijit Singh. Have fun, listening to this "not so Bollywood" album!