Olivia Wilde and Jason Sudeikis party in NYC, and more Celeb Sightings

Sep. 30, 2013 at 2:14 PM ET

Image: BESTPIX: 2013 Global Citizen Festival in Central Park to End Extreme Poverty - Backstage
Stars take action at the Global Citizens Festival, Justin Timberlake performs in London, Steve Carrell poses with a duck, and more.