Priyanka Chopra, Sidharth Malhotra, Deepika Padukone, Anushka Sharma, Arjun Kapoor, Amrita Arora, Shakeel Ladak, Ali Fazal, Dia Mirza , Sahil Sangha, Aditya Roy Kapoor, Shilpa Shetty, Kangana Ranaut, Ranveer Singh, Nargis Fakhri, Sohail KhanImran Khan, Avantika Malik, Kalki Koechlin, Abhay Deol and Preeti Desai attend Ritesh Sidhwani's birthday bash