The last thing you want happening on your vacation is winding up in the hospital, and unfortunately for Robin Roberts, that's how her trip to Key West ended. On Thursday the GMA anchor told her fans on Facebook, "I began not to feel well. Nothing serious, just under the weather," she wrote. "I contacted my doctors and flew back to NYC. They felt it best to admit me into the hospital for a few days. Seems my young immune system needed a little boost to fight off 'opportunistic infections.'"