Karan Johar recently celebrated 75th birthday of his mother Hiroo Johar which was attend by his close friends & Bollywood celebs. His mother Hiroo Johar turned 75 and KJo decided to surprise her by making sure that she had her favourite people by her side on the special day. Karan and his twins Yash and Roohi kick started the evening with a family picture & this grand celebration was attend by Kajol, Kareena Kapoor Khan, Rani Mukerji, Kajol, Sidharth Malhotra, Tanisha Mukerji, Manish Malhotra and Shweta Bachchan Nanda.