The multi-platinum singer said on Twitter that he had undergone surgery and received chemotherapy and radiation for the past six months. “So far, so good,” said Keith, a 61-year-old Oklahoma native who turned July 8. “I need time to breathe, to recover and to relax. “I look forward to spending this time with my family. But I will see the fans sooner rather than later. I can not wait.” 2 dead, 4 injured in Gary nightclub shooting See 10 Senate Republicans backing bipartisan gun bill The state of Keith’s performances for the rest of this year was not immediately clear. His next show is scheduled for June 17 in Wheaton, Illinois, according to his website. Following Keith’s announcement, the Ohio State Fair announced that his July 28 concert in Columbus, Ohio, had been canceled. Keith journalist Elaine Schock said in an email Sunday night that some tour dates would be canceled, “but I’m not sure how many at this point.” The Keith Foundation has been helping children with cancer since 2006.