Paul McCartney wrote a few heartfelt songs about more than one person; and a few of them are absolutely heartwrenching.

Paul McCartney entered the 21st Century while in his late 50s, an age when most people are coasting toward retirement. The former Beatles star had certainly earned it. He’d been inducted into the Rock & Roll Hall of Fame with the Beatles more than a decade earlier.

Despite being one of the world’s most famous songwriters, Paul McCartney faced crippling self doubt that he was forced to work through during a difficult era of music making