Rhythm N' Blooms announced earlier this month that Lukas Nelson and Promise of The Real, led by the son of country music star Willie Nelson, was canceling its performance at the Knoxville festival, citing the need for a break from touring.

But multiple people have shared their frustration on social media after Nashville radio station WSM announced Thursday that the band will perform a secret show in Music City on Saturday — the same day they were scheduled to perform at Rhythm N' Blooms.

"What a slap in the face to everyone who was looking forward to your set, me included," Stewart Creswell posted to the band's Facebook page. "If this is how you're going to treat your fans then I refuse to support you any longer. Shame on you!"

The Nashville show is an intimate, promotional gig for the band's upcoming album, rather than the full-scale production expected at Rhythm N' Blooms.

"I understand why people would be frustrated, but I don’t want anybody to be confused," band spokesperson Joel Amsterdam said. "It’s basically a special radio taping where a few fans can win tickets to hear a few tracks from the record and hear about the album. And Lukas is going to play a couple songs acoustic.”

WSM is giving away tickets to the Nashville show through a random drawing. The band played Nashville earlier this week, opening for The Who.

Rayland Baxter will replace the band at Rhythm N' Blooms, performing on the main stage Saturday at 7 p.m.

"Once in a while it happens in the tour schedule, when things get a little too packed, that the band has got to make a tough decision to not overdo it," Amsterdam said. "But I know that Lukas and the guys really regret having to do it and definitely want to make it up somehow.”

Check out our festival guide for more information about the schedule, tickets and parking.