Paul Cattermole has died just weeks after S Club 7 revealed they were returning to the stage for a reunion tour.
The 46-year-old was found dead at his home and there are thought to be "no suspicious circumstances" surrounding his death which has left his bandmates and loved-ones heartbroken.
Bandmate Hannah Spearritt is said to have "broke down" when she was given the shocking news and his bandmates have been left in "horror and disbelief", the Mirror reports.
