Imtiaz Ali's effervescent romantic comedy features a soundtrack by A. R. Rahman that masterfully portrays the film’s spectrum of emotions. The Bollywood composer’s skill with complex arrangements is apparent throughout. There's the energy rush of "Matargashti", with its plinking harmoniums, sitar strings and shout-out choruses, and Alka Yagnik and Arijit Singh's loved-up duet “Agar Tum Saath Ho”, which floats gently along with flute and piano. Even "Wat Wat Wat", a distinctly happy-go-lucky moment, features shehnais, dhols and acoustic guitars.