Death On Display

I put together an extremely-short-notice round for a music quiz on Monday night (it was written during the first two rounds). So maybe you can take pleasure in getting these right (this was probably the easiest). If you get 10 then you can kid yourself you would have won the quiz, and with it some novelty vinyl. The theme was "Dead Musicians," necro:

1. Which longhaired singer killed himself in the greenhouse of 171 Lake Washington Boulevard East in 1994?
2. The killer of John Lennon, Mark David Chapman, was reputedly obsessed with which American novel?
3. Which big band leader disappeared in 1944 on US Army business, travelling to entertain troops in France? His body was never found.
4. Influential bluesman Robert Johnson died from drinking poisoned whiskey at a Missisippi crossroads in 1938. Legend has it he owed his phenomenal guitar-playing abilities to whom?
5. What age were Jimi Hendrix, Janis Joplin, Brian Jones, Robert Johnson and Jim Morrison when they met their untimely ends?
6. Who was shot dead in September 1996 in Las Vegas after attending a Mike Tyson boxing bout?
7. Who hung himself in Macclesfield in 1980, shortly after listening to Iggy Pop's album "The Idiot"?
8. The lead singer of which psychedelic rock band died in a Parisian bathtub in 1971, having snorted heroin?
   
9. Which Welsh co-writer of The Holy Bible has been missing under mysterious circumstances since 1995?
10. What did Don McLean famously call the day of Buddy Holly's death in a plane crash (slightly more than) 50 years ago?

Of course, I had to hastily apologise that in questions 2 and 9 I could not guarantee the death of the persons in question. And to add that in 7 that the relationship was not causative. I'll put the answers in a comment. Tell me how you did?