The Jackson family patriarch has been in Albert Einstein Hospital in Sao Paulo, Brazil since Sunday (26Jul15), after experiencing signs of a stroke while in the country to celebrate his 87th birthday.

Joe's heart stopped three times, and he subsequently underwent surgery on Monday (27Jul15) to have a permanent pacemaker fitted.

He has been recuperating at the hospital since the operation, and now Entertainment Tonight reports that his superstar daughter has decided to put rehearsals for her much-anticipated The Unbreakable World Tour to a halt in order to be by her father's side.

Janet's first trek in four years is slated to kick off on 31 August (15) in Vancouver, Canada.