Of late, many music idols have stepped forward to declare that their health is top priority. Recently, Madonna chose to reschedule her impending tour due to a near-fatal bacterial infection. Others stars such as Ozzy Osbourne, Céline Dion, Justin Bieber, and Shawn Mendes have also been compelled to cancel or postpone their highly anticipated tours due to health challenges and concerns. Here’s a look at all those who took this tough call.