Janet Jackson
Janet Jackson is in middle of her Unbreakable World Tour, which has stops in the US, the UK and JapanGetty

Janet Jackson has been forced to postpone two more live dates on her Unbreakable tour as she continues to undergo vocal rest on doctor's orders. The 49-year-old songstress was due perform in Kansas City and St Louis on 27 and 29 October respectively but has had to reschedule.

Taking to Twitter, the sister of the late Michael Jackson told fans she had to bow out at the 11th hour but would be returning to the stage soon. "Must postpone Kansas City & St Louis... Doctors orders. Hold onto your tickets! I'll be back in Omaha. #Unbreakable" she wrote.

The That's The Way Love Goes hit maker is in currently in the middle of the US leg of her Unbreakable World Tour and previously cancelled shows on 24 and 25 October in Salt Lake City and Denver. The tour dates have not yet been rescheduled.

Earlier in October, Jackson unwittingly became embroiled in controversy after fans complained they had their Instagram accounts suspended for posting live videos of the singer's US tour. The pop icon responded to the backlash by changing the way her team resolves copyright issues. "I want you to know that I enjoy watching the short clips of how you are Burning It Up at the Unbreakable shows. Please keep posting them," she said.

"My team is passionate about protecting the intellectual property we are creating for the tour and possible future projects. It was never their intention, acting on my behalf, to have social media accounts removed.

"Permitting the use of long clips does present a contractual problem for these projects. I hope you understand. I trust the fans will use their short recordings for their own memories and to share on their social media networks of choice. I have asked my team to change their approach and allow you to engage socially with these videos."

Jackson recently announced details of four UK arena dates to take place in March and April 2016. Fans can watch her live in Birmingham, London, Glasgow and Manchester.