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.

Kendrick Lamar

Kendrick Lamar performs at the Global Citizen Festival
Kendrick Lamar performs at the Global Citizen Festival in Central Park on Sept. 24, 2016. (Credit: Getty Images for Global Citizen / Theo Wargo)

Usher and Ruben Blades

Usher and Ruben Blades perform at the Global
Usher and Ruben Blades perform at the Global Citizen Festival in Central Park on Sept. 24, 2016. (Credit: Getty Images for Global Citizen / Theo Wargo)

Eddie Vedder & Chris Martin

Eddie Vedder and Chris Martin perform at the
Eddie Vedder and Chris Martin perform at the Global Citizen Festival in Central Park on Sept. 24, 2016. (Credit: Getty Images for Global Citizen / Theo Wargo)

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James Hetfield & Kirk Hammett

James Hetfield, left, and Kirk Hammett of Metallica
James Hetfield, left, and Kirk Hammett of Metallica perform at the Global Citizen Festival in Central Park on Sept. 24, 2016. (Credit: Getty Images for Global Citizen / Theo Wargo)

Lars Ulrich

Lars Ulrich performs with Metallica at the Global
Lars Ulrich performs with Metallica at the Global Citizen Festival in Central Park on Sept. 24, 2016. (Credit: Getty Images for Global Citizen / Theo Wargo)

Becky G

Becky G performs at the Global Citizen Festival
Becky G performs at the Global Citizen Festival in Central Park on Sept. 24, 2016. (Credit: Getty Images for Global Citizen / Theo Wargo)

Kenyan Boys Choir

The Kenyan Boys Choir performs at the Global
The Kenyan Boys Choir performs at the Global Citizen Festival in Central Park on Sept. 24, 2016. (Credit: Getty Images for Global Citizen / Theo Wargo)

Ellie Goulding and DJ Diplo

Ellie Goulding and DJ Diplo perform at the
Ellie Goulding and DJ Diplo perform at the Global Citizen Festival in Central Park on Sept. 24, 2016. (Credit: Getty Images for Global Citizen / Theo Wargo)

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Forest Whitaker

Forest Whitaker speaks at the Global Citizen Festival
Forest Whitaker speaks at the Global Citizen Festival in Central Park on Sept. 24, 2016. (Credit: Getty Images for Global Citizen / Theo Wargo)

Yusuf Islam

Yusuf Islam -- formerly Cat Stevens -- performs
Yusuf Islam -- formerly Cat Stevens -- performs at the Global Citizen Festival in Central Park on Sept. 24, 2016. (Credit: Getty Images for Global Citizen / Theo Wargo)

MØ performs at the Global Citizen Festival in
MØ performs at the Global Citizen Festival in Central Park on Sept. 24, 2016. (Credit: Getty Images for Global Citizen / Theo Wargo)

Demi Lovato

Demi Lovato performs at the Global Citizen Festival
Demi Lovato performs at the Global Citizen Festival in Central Park on Sept. 24, 2016. (Credit: Getty Images for Global Citizen / Theo Wargo)

Salma Hayek and Queen Rania Al-Abdullah

Salma Hayek and Queen Rania Al-Abdullah of Jordan
Salma Hayek and Queen Rania Al-Abdullah of Jordan speak at the Global Citizen Festival in Central Park on Sept. 24, 2016. (Credit: Getty Images for Global Citizen / Theo Wargo)

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Poonam Mahajan, Priyanka Chopra & Chris Martin

Poonam Mahajan, a member of parliament from Mumbai
Poonam Mahajan, a member of parliament from Mumbai North Central; actress Priyanka Chopra; and Chris Martin of Coldplay speak at the Global Citizen Festival in Central Park on Sept. 24, 2016. (Credit: Getty Images for Global Citizen / Theo Wargo)

Olivia Wilde

Olivia Wilde at the Global Citizen Festival in
Olivia Wilde at the Global Citizen Festival in Central Park on Sept. 24, 2016. (Credit: Getty Images for Global Citizen / Theo Wargo)

Hugh Jackman & Chelsea Handler

Hugh Jackman and Chelsea Handler ride a tandem
Hugh Jackman and Chelsea Handler ride a tandem bicycle onstage at the Global Citizen Festival In Central Park on Sept. 24, 2016. (Credit: Getty Images for Global Citizen / Theo Wargo)

DJ Diplo

DJ Diplo of Major Lazer performs at the
DJ Diplo of Major Lazer performs at the Global Citizen Festival in Central Park on Sept. 24, 2016. (Credit: Getty Images for Global Citizen / Theo Wargo)

Kal Penn

Kal Penn at the Global Citizen Festival in
Kal Penn at the Global Citizen Festival in Central Park on Sept. 24, 2016. (Credit: Getty Images for Global Citizen / Noam Galai)

Pete Wentz

Pete Wentz at the Global Citizen Festival in
Pete Wentz at the Global Citizen Festival in Central Park on Sept. 24, 2016. (Credit: Getty Images for Global Citizen / Noam Galai)