Bollywood's latest heartthrob Arjun Kapoor turned 28 on June 26 and cousin Sonam Kapoor threw a birthday bash for her bro. And surprise surprise! we spotted love birds Katrina Kaif and Ranbir Kapoor partying withBarfi! actor's ex girlfriend Deepika Padukone, Ranveer Singh, Priyanka Chopra, and Parineeti. A look at who else made it to the rocking party.