The Elvis non-starring story

Elvis Presley, a crooner of note and owner of the second best quiff in history, was supposed to star in A Star Is Born with Barbra Streisand but Colonel Tom Parker (he was neither a colonel, nor Tom Parker) intervened. The role went to Kris Kristofferson.

For a long time it was also a strong belief of Dr K that Elvis was still alive. Why was the corpse sweating?