Who knew that cows enjoyed music?

This guy did, obviously!

Watch as Kansas farmer Derek Klingenberg sets up his lawn chair, pulls out his trombone and starts going to town covering Lorde's "Royals."

At first, it appears as though he's playing to an empty field.

But watch closely as over the horizon, little black specs start to appear. Those specs are cows. And there are lots of cows.

They walk right up to Farmer Derek and moo along with him as he rocks out!

Here's Lorde's original version of "Royals," minus the trombone and sans the cows.