Original: Harry Edward Nilsson III ( June 15 , 1941 -- January 15 , 1994 ) , who sometimes went by the stage name Nilsson , was an American songwriter who achieved the peak of his commercial success as a singer in the mid 1970s .
Simplified: Harry Edward Nilsson III ( 1941-1994 ) was an American singer and songwriter , whose biggest hits were during the late 1960s , and the 1970s .