Today, the music industry’s biggest stars and the world’s humanitarian leaders are coming together for the third annual Global Citizen Festival to spotlight efforts that could change millions of lives across the globe. Attendees of the festival had to earn their way into the concert -- by taking action to improve the lives of more than 50 million people via vaccines, education, sanitation, and more. Here are their stories: Carmen Chiles, 35, Lancaster, PA "The Global Citizen Festival is symbolic of the reward you get from helping others. We all need to give back. Not to mention we are all massive fans of these artists. " Sophia Bailey, 50, Barbados "I'm here today because I believe we should help each other. There's too much suffering in the world." Rebecca Hippolyte, 26, Rockland, NY "I'm here to promote the cause and to bring awareness about poverty -- [and] the small things we can all do to bring change." Michaella Holden, 33, Northfield, MN "I love outdoor concerts and I consider myself a person who believes in making change in the world." Geo C., 33, Toronto, Canada "Global Citizen Festival is actually seeing action happen. It's about equality and quality of life." Alton Roache, 28, Bronx, NY “I'm here for a good cause and to see great performances. I want to help end poverty and help the homeless.” Darren Ferrell, 45, State College, PA "I was in a remote place in the Philippines and I saw some poverty that was really striking, so I wanted to support this. It's a good cause." Jamie Isabella, 38, Brooklyn, NY “I'm here in support of ending extreme poverty by 2030. Especially poverty in the US.” Related: Join the #GlobalCitizenFestival conversation