Priyanka, Ranbir, Katrina, Alia attended the Birthday bash of Arjun Kapoor (view pics)

New Delhi, June 27: It was a star-studded birthday bash of actor Arjun Kapoor who turned 28 yesterday on 26th June. The event was hosted by Sonam Kapoor and number of A-listers namely Priyanka Chorpra,