Randy Jackson has been hospitalised with a suspected mild heart attack.

The 48-year-old singer - who is the brother of late 'Thriller' star Michael Jackson - was taken to the Huntington Memorial Hospital in Pasadena yesterday (15.06.10) and is said to be awaiting test results.

A source told the Mail Online: "It appears Randy has had a mild heart attack but he is OK.

"He was joking around with his father and he is feeling pretty good all things considered. He's been under a tremendous amount of stress lately but Randy's a fighter. He'll pull through."

Randy is believed to have been working on arrangements for a memorial service for his late brother Michael - who died of acute Propofol intoxication in June last year.

On Monday (14.06.10), Randy attended a Los Angeles courthouse with family including sister Janet Jackson for a hearing into the involuntary manslaughter case against Dr. Conrad Murray, the man accused of being involved in the 'Billie Jean' hitmaker's death.

The star has also been playing a key role in arranging plans to allow fans to enter Forest Lawn Memorial Park - where Michael is buried - to pay tribute to the King of Pop on the anniversary of his death later this month.