Fans of Earl Sweatshirt received some disappointing news, as the OFWGKTA rapper has nixed his Bonnaroo set.

Earl took to Twitter to announce to his fans that he will not be able to make his set at Bonnaroo this year due  to illness. Apparently, however, some fans weren't too happy about the news, prompting him to challenge fans to, "get pneumonia and then try singing 'whoa'...with no hypeman."

Earl isn't the only act to cancel his set at the Tennessee festival, however. Folk-pop group Mumford and Sons also nixed their set after their bassist was forced to go into surgery for a blood clot on the surface of his brain.