It will be a blue Christmas for Janet Jackson fans. On Christmas Eve, the pop icon took to Twitter to reveal that she has postponed the remaining dates on her “Unbreakable World Tour” until the spring to undergo surgery.

She didn’t specify what she needs surgery for and said that there will be no further comment. “Please pray for me, my family and our entire company during this difficult time,” said Jackson, whose first album in seven years, Unbreakable, debuted at No. 1.

The worldwide tour, which kicked off in August, was set to continue on Jan. 9 in Denver before heading overseas to the U.K. in March and April. She will honor the tickets when the new schedule is announced.

Read her full statement below.

“Hey you guys… Happy Holidays to each and every one of you. I need you to know, I learned today, from my doctors that I must have surgery soon. It breaks my heart to tell you that I am forced to postpone the Unbreakable Tour until the spring. Every date will be rescheduled. Please hold on to your tickets. They will be honored in a special way when the new schedule is announced. Please pray for me, my family and our entire company during this difficult time. There will be no further comment. I love you all so much and am ever grateful for your understanding and your love. Gon’ b alright.”