Post Malone called off his concert in Boston on Saturday after being hospitalized. The “Circles” artist broke the news and opened up about his health situation in a note posted to Twitter that evening. He explained in part, “I woke up to cracking sounds on the right side of my body. I felt so good last night, but today it felt so different than it has before. I’m having a very difficult time breathing, and there’s like a stabbing pain whenever I breathe or move. We’re in the hospital right now, but with this pain, I can’t do the show tonight.”