Paul McCartney brought James Corden to tears with the story behind 'Let It Be.'

That's exactly what happened when he guested on an episode of "Carpool Karaoke." The legendary performer rolled through his hometown of Liverpool with host James Corden, sharing memories of the city, surprising fans in his favorite pub, and bringing all of us a badly needed emotional release with his music.

The most prevailing themes in The Beatles' music are those of love, peace, joy, and togetherness. It's the kind of music that you put on during the happiest times and when you've had a really rough day.

One of the most comforting songs in difficult times is "Let It Be," and that's no accident. During their road trip, McCartney told Corden it was inspired by a dream of his late mother.

"My mum, who died, came to me in the dream and was reassuring me, saying it's gonna be OK, let it be." McCartney said. "I wrote the song 'Let It Be,' but it was [inspired by] her positivity."

Source: Mark Shrayber/upworthy.com

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