The title song from the Shraddha Kapoor and Aditya Roy Kapur starrer upcoming film 'OK Jaanu' was released on Tuesday. Composed by AR Rahman, the song has been sung by AR Rahman and Srinidhi Venkatesh, with lyrics penned by Gulzar. Directed by Shaad Ali, the film, produced by Karan Johar and Mani Ratnam is scheduled to release on January 13.