Janet Jackson, who recently postponed her Unbreakable Tour, has undergone surgery and is reportedly being tested for throat cancer.

Radar Online reports that the reason the 49-year-old singer needed surgery and had to postpone her tour is because of a cancer scare.

Janet Jackson Battling Cancer?: Vocal Chord Tests Find Scary Growth — Report https://t.co/lUILObuPaP pic.twitter.com/M5sqyRdCwR

— HollywoodLife (@HollywoodLife) January 6, 2016

Jackson announced the cancellation of her tour on her Facebook page on Christmas Eve.

“I need you to know, I learned today, from my doctors that I must have surgery soon,” Jackson said. “It breaks my heart to tell you that I am forced to postpone the Unbreakable Tour until the spring.”

Jackson was scheduled to start the 2016 leg of her tour in Denver on January 9 and continue until the end of June.

According to the website, sources said doctors “found a growth on Janet’s vocal cords that could be serious” and needs to be taken care of right away.

Janet Jackson Reportedly Undergoing Tests For Throat Cancer, Will She Ever Sing Again? https://t.co/AL76XpGrYQ pic.twitter.com/4FEpNXX4gK

— Inquisitr Showbiz (@IQShowbiz) January 6, 2016

Stuart Fischer, a doctor who is not treating Jackson, told the website, “God forbid that this should be cancer of the larynx. That would abruptly end her ability to ever perform again.”

While speculation continues, Jackson asked for prayers and reassured her fans.

“Please pray for me, my family and our entire company during this difficult time,” Janet Jackson said in a statement. “I love you all so much and am ever grateful for your understanding and your love. Gon’ b alright.”