Pop star Madonna has cancelled a London concert of her Madame X Tour because of an injury. The singer was scheduled to perform the first of 15 shows on Monday at the London Palladium. In an Instagram post on Saturday, Madonna said she has been “plagued” by injuries since the tour started and has been advised by doctors to take rest. “I am deeply sorry that I have to cancel my concert scheduled for Monday, January 27th in London. Under doctors guidance I have been told to rest for a few days. “As you all know, I have injuries that have plagued me since the beginning of the tour but I must always listen to my body and put my health first. The last thing I want to do is disappoint my fans or compromise the integrity of my show,” she wrote. The 61-year-old singer added that she hopes the show on Wednesday, January 29, will go on as planned.