Chris LeDoux has cancelled three shows while undergoing radiation therapy for cancer. A rodeo star who remains active on the concert circuit, LeDoux has already had a liver transplant after being diagnosed with a rare liver disease in 2000. His manager could not specify LeDoux's form of cancer. "I know it's going to be tough," said LeDoux, "but I'm confident that I can put this behind me and get back to my regular ranch and concert schedule."