Kings of Leon have canceled the remainder of their summer tour in the wake of a disastrous show in Dallas on Friday that was cut short after lead singer Caleb Followill left the stage to vomit. According to the Kings' representative, Followill has been "suffering from vocal issues and exhaustion," and the band have opted to scrap the tour rather than play subpar gigs for their fans.

Due to the Kings' touring commitments abroad, their U.S. shows will not rescheduled. Tickets for those gigs will be refunded at point of purchase, or automatically refunded if ordered online. The band will head back out on tour on September 28th with a show at the Rogers Center in Vancouver, a show originally scheduled for September 14th.

Photos: Kings of Leon at Home

Though the band's official line regarding Caleb Followill's meltdown in Dallas is attributed to exhaustion, comments from his brothers at the concert and on Twitter suggest that he may be dealing with a bigger issue. When apologizing on Twitter, bassist Jared Followill wrote "there are internal sicknesses & problems that have needed to be address" and "I know you guys aren't stupid. I can't lie. There are problems in our band bigger than not drinking enough Gatorade."

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