Imran khan says that it was very difficult to shoot Tayyab Aali song in film 'OUATIM Dubaara!' #onceuponatimeinmumbaidubaara! #OUATIMdubaara! #akshaykumar #sonakshisinha #imrankhan #shoaibkhan #don #onceuponatimeinmumbai #aslam #gangster #reallife #sultan #milanluthria #Eid #eidmubarak #ramzan