Turnpike Troubadours

The three-day festival features acts on the fringes of country music, Americana, folk, bluegrass and beyond.

See the full list of acts set to perform at the Oklahoma music festival this September.

It was a landmark weekend for the beloved country band.

It's an all-star lineup.

The news was delivered on social media on Friday (May 31), with a note asking for continued thoughts and prayers.

Things aren't looking good.

"He has our support 100 percent and we will be here to walk beside him and carry him if needed, no matter the outcome," a note reads.