The US singer last night cancelled the rest of her world tour after she was left unable to walk due to synovitis — a chronic condition which causes joints to swell.
Gaga, 26, had tried to hide her agony from staff, but she was in such pain she could no longer perform. Now she has pulled out of the remaining 21 dates of her Born This Way Ball tour.
She blamed a tear in her right hip — an underlying cause of synovitis — which will need surgery to repair.
Gaga told her 34 million Twitter fans: “I’ve been hiding a show injury and chronic pain for some time now and over the past month it has worsened.
“I hid it from my staff, I didn’t want to disappoint my amazing fans.”
Gaga was in extreme pain after her show in Montreal, Canada, on Monday.
She added yesterday: “I could not walk — and still can’t.” Fans with tickets to the scrapped shows will get refunds, but she said of the cancellations: “I hope you forgive me, as it’s nearly impossible for me to forgive myself. I’m devastated.”
Synovitis is linked to arthritis and auto-immune disorder Lupus — and regular bouts can lead to a crumbling of the joints.
The singer has previously confessed to a history of “borderline lupus”. Her aunt Joanne died of it in 1974.
Gaga is being sued for £250,000 by ex-aide Jennifer O’Neill, who claims the star is a tyrant who demanded that she be on call 24 hours a day.-SUNUK