While many world leaders and top musicians will be taking the stage Thursday at the Global Citizen Festival in Hamburg, Germany, ahead of the G20 summit, President Donald Trump won’t be there…because he wasn’t invited.

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Canada’s Prime Minister Justin Trudeau, Argentina’s President Mauricio Macri, Norway’s Prime Minister Erna Solberg and other world leaders will gather for the event with the likes of Coldplay, Pharrell Williams, Shakira and Ellie Goulding, all with the hope of raising as much as $661 million from governments for dealing with international health, gender equality and education issues.

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Kacper Pempel/Reuters

A source familiar with the policy goals of the organization tells Newsweek that the U.S. president—one of the most powerful individuals in the world—was left off of the invitation list because organizers allow leaders to take the stage only if they make commitments to underprivileged citizens of the world.

Global Citizen, an online platform that tracks and rewards activist action, launched successfully with the Global Citizen Festival in New York City’s Central Park in September 2012. The goal is to end extreme poverty worldwide by 2030. So far, the group’s efforts have resulted in $30 billion in commitments and policy announcements that will affect the lives of 1 billion people by 2030, according to the Global Citizen website.

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Supporters can live-stream this year’s festival on YouTube beginning at 1 p.m. Eastern time.

The festival kicks off the G20 Summit, an international forum for the governments of 20 major economies to discuss policy issues pertaining to the promotion of international financial stability. The summit began in 1999, and is being held this year in Hamburg.

Trump is scheduled to meet with Poland President Andrzej Duda, South Korean President Moon Jae-in, Japanese Prime Minister Shinzo Abe, German Chancellor Angela Merkel and Russian President Vladimir Putin before and during the two-day summit that begins Friday. Much of the early discussion regarding Trump has been focused on his controversial decision last month to withdraw the United States from the Paris climate agreement. He said he made the decision because the pact was unfair to the U.S.

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Meanwhile, a Buzzfeed report from Wednesday said the president was not able to secure a luxury hotel room for his time in Hamburg because administration officials waited too long to book. The Hamburger Abendblatt, a local news outlet, reported that the U.S. government wanted to accommodate Trump in the Four Seasons, but it was already filled. The city of Hamburg apparently stepped in to help after it became apparent the other highest-rated hotels were also already booked, according to the report.

Organizers first announced the summit in February 2016. The White House did not immediately respond to Newsweek’s request for comment.

Trump’s family-owned business includes a worldwide real-estate empire of golf courses, office buildings and of course hotels. But he doesn’t have a hotel in Hamburg, and the Associated Press reported that he will stay at the Senate guesthouse, while the U.S. Consulate General in Hamburg will host his staff.

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