Zach Bryan sent fans wild at his concert ... Hailey was dressed up for the occasion and stepped out wearing white cowboy boots and a matching cowboy hat. She also wore a pair of light blue denim ...

Let's clarify one detail right up front: Though he closed his set Friday at the Austin City Limits Music Festival with a song called "From Austin," Zach Bryan ... sported cowboy hats and others ...

But the designers of Zach ... cowboy boots and hats for those who wanted to really nail the look. The best one-two punch of the night—“best” meaning most emotionally devastating, as Zach ...

From the opening notes of Zach Bryan’s hundred-million streamer ... standing among a sea of cowboy hats hollering every heavy hearted word with the same fervor as the higher-pitched Olivia ...