Better ask for a refund – Kings of Leon has canceled their U.S. tour, including their upcoming show at Darien Lake.

The Tennessee-based rock band has canceled the remainder of their shows in the wake of their unexpectedly abbreviated show in Dallas on Friday.

Lead singer Caleb Followill abruptly left stage in the middle of the show, after telling the crowd, “I’m gonna go backstage and I’m gonna vomit, I’m gonna drink a beer and I’m gonna come back out and play three more songs.” Followill never returned, however, and the band was forced to end the show after profusely apologizing to their fans.

A representative of the band cited health issues as the reason behind Followill’s odd behavior, stating that the singer “suffered from heat exhaustion and dehydration…causing his vocal chords to seize.”

But Followill’s bandmates, two of whom are his siblings, alluded to a deeper problem. In the aftermath of their curtailed concert and canceled tour, the boys went on Twitter to further apologize to fans. Bassist Jared Followill tweeted, “I love our fans so much. I know you guys aren’t stupid. I can’t lie. There are problems in our band bigger than not drinking enough Gatorade.”

Uh oh. Sounds like trouble in paradise for America’s rock and roll darlings.

Luckily, Live Nation is offering refunds for all tickets purchased for the tour. Visit livenation.com to find out more.