Selena Gomez, Olivia Wilde, and MORE @ Global Citizen Festival in NYC - Sept 29

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Celebrities were on board for The Global Citizen Festival in New York City on Saturday.  Selena Gomez served as host of the event.  Celebrities at charity events are always inspiring, because of they give their time, and encourage others to give back.  Cool!

Chelsea Clinton and K'naan 

Olivia Wilde 

Katherine Mcphee

Michelle Trachtenberg

John Legend 

Petra Nemcova 

Petra and K'naan

Colin Hanks

Quddus

Sophia Bush

Lauren Bush

Madame Mayhem

getty