This year's Global Citizen Festival, on Sept. 24, brought a diverse lineup -- including Metallica, Kendrick Lamar, Demi Lovato and Usher -- to Central Park.
The event, in its fifth year, encourages people to get involved and tackle global issues pertaining to health, education, hunger and the environment.
See photos from festival, which was celebrity-packed.
Usher and Ruben Blades
Eddie Vedder & Chris Martin
James Hetfield & Kirk Hammett
Kenyan Boys Choir
Ellie Goulding and DJ Diplo
Salma Hayek and Queen Rania Al-Abdullah