Lady Gaga announced via Twitter that she is cancelling 4 shows due to injury.
Due to a case of synovitis, (severe inflammation of joints) Gaga’s doctor has ordered her to postpone show in Chicago, Detroit + Hamilton
— Lady Gaga (@ladygaga) February 12, 2013
The cancelled shows are:
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)