By the way if you don’t know, ‘Yeh Jawaani Hai Diwaani’ is a song title lifted from the Randhir Kapoor-Jaya Badhuri film titled ‘Jawaani Deewani’. It was a fun film to watch, as Jaya Badhuri Bachchan doesn’t really act in fun films. She is more of a serious cinema kind of actress. Anyways for Ranbir Kapoor‘s friend Ayan Mukherji to borrow this song title, I sure hope this film lives up to its expectations. This film aside, Ranbir Kapoor is seen here with his mummy dearest Neetu Singh and his ex-girlfriend Deepika Padukone celebrating his birthday along with the crew of ‘Yeh Jawaani Hai Deewani’.