Donna Summer believed the 9/11 terrorism acts contributed to her lung cancer.
The star died aged 63 this week and according to reports she had complained that toxic dust containing lead, asbestos and Mercury was the reason for her ill health.
Donna - who passed away in Florida - was in a nearby apartment building in New York City on the day of the attacks in 2001.
According to The Sun, the devout Christian had previous said: "I was really freaked out by the horrific experiences of that day.
"I couldn't go out, I didn't want to talk to anybody. I had to keep the blinds down and stay in my bedroom. I went to church and light came back into my soul. That heaviness was gone."