Madonna postponed her Monday night concert at Brooklyn Academy of Music due to a previously undisclosed knee injury.

The 61-year-old pop icon issued a statement on her Twitter account and shared that she is currently dealing with a knee injury. The doctors have advised her to take a rest for the next three days to assist in her recovery.

In a message posted on social media, the “4Minutes” hitmaker wrote that she is a “not a quitter” and ensured the fans she will be back with a bang “in few days.” The statement also said that it is hard for Madame X to admit that she is also a human being made of flesh and blood and must take proper care of her health, so that she can see her fans without wasting much time.

“I am not a quitter. This hurts me more than you can imagine. It is time to take those heels and fishnets off for a few days! Thank you for your understanding,” she wrote.

This is not the first time a show has been rescheduled on this ongoing tour. In August she announced the first show of the tour in New York would move forward five days to Sept. 17, and she rescheduled two other concerts for Oct. 10 and Oct. 12. Meanwhile, one show, which was previously scheduled for Sept. 15, was canceled entirely.

The shifting of dates comes after it was reported that the tour opened to slow ticket sales and was criticized by various media outlets for being too expensive. Arthur Fogel, the tour promoter, denied all these allegations and told Billboard that the tickets were selling fine and also confessed that they might add more dates.

On the other hand, the “Borderline” singer recently displayed her amazing style by sporting a pair of joggers and semi-sheer black tights. Maintaining her eccentric appearance, the singer was seen wearing a cozy hooded jumper, covered with red paisley printing and the letter “VU” illuminated across it.

The songstress completed her look by wearing a pair of heeled brogues, and accessorized her get-up with some gold jewelry, a feather print fedora, and ski-inspired shades.

Madonna poses backstage at MTV Video Music Awards at Radio City Music Hall, New York, Aug. 20, 2018. REUTERS/Carlo Allegri