gaga021313cropcancel.jpg Mother Monster is under the weather!

After Lady Gaga was forced to cancel four upcoming shows due to a case of synovitis, which causes severe inflammation of the joints, it has now been announced that she is canceling the remainder of her Born This Way Ball Tour to undergo hip surgery for her injuries.

"She will need surgery to repair the problem, followed by strict down time to recover," read a statement from concert promoter Live Nation.

The singer must be beside herself, considering she was so upset the other day when she announced she was canceling her shows in Chicago, Detroit, and Ontario.

"I barely know what to say. I've been hiding a show injury and chronic pain for some time now, [and] over the past month it has worsened. I've been praying it would heal. I hid it from my staff. I didn't want to disappoint my amazing fans. However, after last night's performance I could not walk and still can't," she wrote on her Facebook page Tuesday.

"I hope you can forgive me, as it is nearly impossible for me to forgive myself. I'm devastated & sad. It will hopefully heal as soon as possible. I hate this. I hate this so much. I love you and I'm sorry," she added on her page.

We know how much Gagaloo lives for her "Little Monsters" so she must be bummed!