Michael Jackson's kids 'vacation in Hawaii'

Michael Jackson's children have been photographed vacationing in Hawaii.

Pictures posted by the Daily Mail show Prince Michael, 13, and Blanket, 8, swimming in the sea, while Paris, 12, was photographed at their hotel pool. It is reported that Jackson's mother Katherine was also on the holiday.

The trip comes as fans around the world prepare to mark the one-year anniversary of the popstar's death on June 25, 2009. It is thought that many will visit his grave at the Forest Lawn Cemetery in Los Angeles, while tributes have been left on his Hollywood star and other events are planned.

The newspaper reports that Katherine and his children will pay their respects at the family's home in Gary, Indiana later today.

Katherine recently thanked fans for their support and tributes over the past year in a YouTube video.