Great LawnJohn Mayer Alicia KeysKatie Holmes

Almost 60,000 people turned out for the second annual Global Citizeundn Festival at the Great Lawn in Central Park on Saturday. The festival was created as a benefit for the mission of eradicating extreme poverty worldwide, and coincides with the United Nations General Assembly. Held as a marathon music event, this year's guests included Stevie Wonder, Alicia Keys, John Mayer, Kings of Leon, Janelle Monae, and Elvis Costello. Here's a roundup of our favorite Instagram photos from the weekend's blowout event.