Tragic new details emerge about Prince's last days.

Found slumped in a lift, not moving, not breathing, it was a tragic end to a vibrant life. But as doctors await Prince‘s autopsy results, his family, friends and fans are left asking what killed the pop superstar.

The 57-year-old music icon’s final weeks were plagued by sickness severe enough that he was forced to cancel concerts and appearances. A bad case of the flu, his management said.

Flu apparently bad enough to force an emergency landing of his plane.