Lady Gaga cancels tour to have hip surgery AFP 2/14/2013 4:40:13 AM Lady Gaga has canceled the rest of her "Born This Way Ball" tour due to a long-standing hip problem that requires surgery.In a series of tweets, Lady Gaga said she had been hiding a show injury and chronic pain for some time and that it had worsened over the past month."I hid it from my staff, I didn't want to disappoint my amazing fans," she tweeted.The latest tweet described her condition as a case of synovitis, an inflammation of the joints.Tour operator Live Nation Global Touring said the superstar singer has a labral tear of the right hip."She will need surgery to repair the problem, followed by strict down time to recover," said a statement. "This unfortunately will force her to cancel the tour so she can heal."Live Nation said refunds for the canceled performances will be available starting Thursday.