A week prior to his death, Prince's plane was forced to make an emergency landing
in Moline, Illinois, where he was transported to a nearby hospital. A source very close to the situation told ET that Prince was battling the flu, which turned into walking pneumonia. In addition, the "Purple Rain" singer was dealing with a hip injury and had a problem with Percocet, according to the source. We are told his issue with the powerful narcotic began years ago, shortly after he underwent hip replacement surgery in 2010.