[HIGHLIGHTS] Paul McCartney remembers how his mother inspired him to write "Yesterday."

Paul McCartney remembers how his mother inspired him to write "Yesterday.". Paul McCartney has often been amused by the fact that some of the song's more prominent performers, such as Marvin Gaye and Elvis Presley, have changed a line.

McCartney's mother Mary died of cancer in 1956; her son Paul was only 14 years old. It only became clear to him years later that a line like “Why she had to go, I don’t know, she wouldn't say” could be about his mother.