Kun Faaya Kun' the latest song from the one of the most exciting movies Rockstar. In this movie Ranbir Kapoor has shed his boy next door image and we believe this is his best work done so far. This song is sung by Mohit Chauhan, Javed Ali, A R Rahman whereas lyrics are penned down by Irshaad Kamil who has also given lyrics in upcoming hindi movie Mausam.
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