The US superstar, who revealed Tuesday that she suffers from the chronic disease fibromyalgia, had been due to open the festival on Friday in Rio de Janeiro.
“I was taken to hospital it’s not simply hip pain or wear & tear from tour, I’m in severe pain. I’m in good hands w/ the very best doctors,” she tweeted.
“Brazil, I’m devastated that I’m not well enough 2 come to Rock in Rio. I would do anything 4 u but I have to take care of my body right now,” she tweeted.
A statement from Rock in Rio, which is to be staged in the barely used Olympic Park in Rio de Janeiro, said Lady Gaga “is undergoing treatment by medical specialists.”
“Rock in Rio regrets to announce the cancellation of her show,” the statement said.