Shah Rukh Khan hides under an umbrella, as his wife, Gauri Khan, Shilpa Shetty, Raj Kundra, Bipasha Basu, Karan Singh Grover and Karishma Tanna, Hrithik Roshan and his girlfriend, Saba Azad attend Fighter director Siddharth Anand’s wife Mamta Anand’s birthday.