Jimmy Buffet went to the doctor for a routine check up and ended up in the hospital with an issue that required immediate attention. He is postponing a concert that was supposed to take place on Saturday. The nature of his health problem hasn't been shared, but on Facebook he jokes that "growing old is not for sissies." Jimmy was in Boston when he was admitted to hospital. He also thanked his fans for their support and said he will be back on stage as soon as his health allows it.