Janet Jackson postpones world tour

Janet Jackson is postponing her world tour until next year (16) as she undergoes surgery.

The star broke the news on Twitter.com on Thursday (24Dec15), and told her fans she needs "surgery soon" and was forced to put back her Unbreakable World Tour dates until the spring.

Janet did not reveal what surgery she needs, but reassured fans the dates will be rescheduled and details will be announced soon.

"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, " she wrote.

"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 (sic)."

Janet's huge tour began in August this year (15) and was set to finish in June, 2016. The next scheduled date was 9 January (16) at the Pepsi Center in Denver, Colorado.

It isn't the first time the superstar has been hit with medical woes during her world tour - she canceled six shows in October (15) after being told by doctors to rest her vocal cords.