Post Malone (27) had to cancel his planned concert in Boston an hour before the start. The reason: The “Circles” interpreter had to be treated in the hospital with breathing problems. "It's very difficult for me to breathe and I feel a sharp pain whenever I breathe or move," he wrote in a message on Twitter Saturday night. He is currently in the hospital and cannot do the evening show.

He's "so damn sorry". He promises that he will "make amends." The tickets purchased are valid for the postponement date that he is currently planning.

The shocking news comes just days after Post Malone fell at a concert in St. Louis on September 17. On stage, he stepped into a hole that wasn't adequately covered. His head and body hit the ground unchecked. The musician then had to be given medical attention. After a brief interruption, however, he was able to continue the concert.

During a subsequent examination at the hospital, the doctors found an injury to the ribs. His management confirmed this to "CNN". Now the injuries seem to be more serious than originally thought.

Post Malone is currently on a major tour of North America, Canada, New Zealand and Australia.