At Global Citizen Festival yesterday, legend Stevie Wonder appeared to address the controversy swirling around NFL players who kneel in protest during the National Anthem, announcing onstage he was "taking a knee for America" as he got down on his knees with the help of his son.

"Tonight, I’m taking a knee for America,” Wonder said at the Central Park festival. "But not just one knee. Both knees. Both knees, in prayer for our planet, our future, our leaders of the world and our globe. Amen."

The move appeared to be in reference to Donald Trump's recent call for the NFL to suspend or fire players who protested the National Anthem during games. That initiative was started by Colin Kaepernick, a quarterback formerly with the San Francisco 49ers who began taking a knee during the anthem to protest police violence against black Americans.

"Wouldn’t you love to see one of these N.F.L. owners, when somebody disrespects our flag, to say, 'Get that son of a bitch off the field right now, out, he’s fired!'" Trump said at a rally in Huntsville, Alabama on Friday, after asking the crowd if "people like yourselves" were also angry at "those people" who kneeled. "You know, some owner is going to do that. He’s gonna say, 'That guy disrespects our flag, he’s fired.' And that owner, they don’t know it. They don’t know it. They’re friends of mine, many of them. They don’t know it. They’ll be the most popular person, for a week. They’ll be the most popular person in the country."

In addition to kneeling onstage yesterday, Wonder gave a speech about Global Citizen's mission, which is to end extreme poverty. "All of us are valuable and important and must take care of each other and this planet," he said. "If we don't, we could lose the ultimate video game of life. Losing sight that weapons are real and rhetoric is dangerous. Whether it be from a superpower in North America or a superpower in North Korea."

Wonder performed a medley of his hit songs, with excerpts from tracks like "Signed, Sealed, Delivered I’m Yours" and "Higher Ground." He also performed some songs with Pharrell, including "Happy," and Daft Punk's "Get Lucky."