Lady Gaga's postponed four dates on the US leg of her tour due to inflammation of her joints

Rising star Lady Gaga has been forced to postpone four dates on her US tour due to a case of "severe inflam­ma­tion of joints". And no that doesn't mean she's 'sparked up' a 'joint', ho ho not-very ho.

'Taking to Twitter' last night the 'Marry The Night hitmaker explained: "I've been hiding a show injury and chronic pain for sometime now, 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 nights per­form­ance I could not walk and still can't," she continued.

"To the fans in Chicago Detroit & Hamilton I hope you can forgive me, as it is nearly impossible for me to forgive myself. Im devasted & sad."

These are the dates in question:

Feb 13: Chicago, Ill. (United Center)
Feb 14: Chicago, Ill. (United Center)
Feb 16: Detroit, Mich. (Palace of Auburn Hills)
Feb 17: Hamilton, Ont. (Copps Coliseum)