Did Elvis really die in 1977? ?

I have been listening to Christmas music from everyone from Paul McCartney to Bruce Springsteen. McCartney is 80 and so is Mick Jagger. Jerry Lee Lewis was 85 when he died last October. It is hard for me to believe that Elvis really died at age 42. There were numerous Elvis sightings in the years after his supposed death. I just wonder if he just got tired of being Elvis and just decided to live a quiet life in Cleveland.

Is Elvis having a Blue Christmas?
Is Elvis having a Blue Christmas?
Did Elvis really die in 1977? ?
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