Zac Brown lends his voice on comedian and rapper Lil Dicky's latest song "Earth."

"Earth" is a song and accompanying music video that spotlights the problems with our planet, while using comedy and animation to make it easier to swallow.

Brown also appears in the music video as a cow. Brown sings in an autotuned tone, "How's it going? I'm a cow. Moo. You drink milk from my t-ts."

Brown's part in the song is short, but for great reason: There are quite a few other voices in this production as well. Other special guests in the song include: Justin Bieber, Ariana Grande, Halsey, Brendon Urie, Hailee Steinfeld, Wiz Khalifa, Snoop Dogg, Kevin Hart, Adam Levine, Shawn Mendes, Charlie Puth, Sia, Miley Cyrus, Lil Jon, Rita Ora, Miguel, Katy Perry, Lil Yachty, Ed Sheeran, Meghan Trainor, Joel Embiid, Tory Lanez, John Legend, Psy, Bad Bunny, Kris Wu, Backstreet Boys and Leonardo DiCaprio.

“Like a lot of people, I had a vague idea that something bad was happening here on Earth, but I didn’t really realize how insane our climate crisis is and how screwed humanity is about to be,” says Lil Dicky. “It’s full-on crazy! If we don’t get our act together now, and change a lot about our fundamental behavior, Earth will become unlivable alarmingly soon.

"Why did it take me so long to get wind of this? I feel like everybody on the planet should be talking about this 24/7," he continues. "But that’s not the case. So I wanted to make the most entertaining and epic piece of content possible, to get everyone aware and talking. Because it’s now or never… Let’s save the Earth!"

Profits from the song, music video, and merchandise will be donated to the Leonardo DiCaprio Foundation which focuses on environmental and wildlife protection and activism.

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