Madonna developed a "serious bacterial infection" which led to the singer postponing her world tour, it was revealed earlier this week.
And now it has been reported that the singer has been "constantly pushing herself" in recent weeks and months as her now-postponed world tour loomed.
The 64-year-old starlet has been in the public eye for years, with the Material Girl singer planning to push herself to the limit for her 84-date Celebration tour, which was due to commence next month.