A serious injury has forced Lady Gaga to cancel the remaining dates of her "Born This Way Ball" tour.

She initially canceled a few concerts and tweeted an apology to her fans that said she was suffering from severe inflammation of the joints. 

Doctors, however, found a labral tear of her right hip that will require surgery.

Lady Gaga arrives at the Versace atelier in Milan, Italy on Oct. 1, 2012. /AP

According to reports, her full recovery could take three to six months. Lady Gaga launched her "Born This Way Ball" tour in April 2012. The tour sold 1.6 million tickets and grossed $168.2 million.