The 35-year-old actor took to Instagram where she posted some pictures from the event, which was also attended by celebrities such as Demi Lovato, Lupita Nyong'o, Frieda Pinto and Deborra-lee Furness.
"I had the best time hosting @GlobalCitizen! Proud to be a Global Citizen Ambassador. Swipe left for more from today! #GCFest @ddlovato @hughcevans @lupitanyongo @freidapinto @realmonaghan @nycmayor @deborralee," wrote Chopra, alongside some pictures from the festival.
The "Quantico" actor also got clicked with Australian humanitarian Hugh Evans and actor Michelle Monaghan.
Pharrell Williams, Big Sean, Andra Day and Alessia Cara also gave special performances.