Sir Paul McCartney discusses everything from John Lennon’s insecurities to not being able to read or write music in a tell-all new interview with “60 Minutes”.

The 76-year-old, who has spent more than 50 years in the music industry, admits it’s “embarrassing” that he can’t read or write music, despite being the mastermind behind so many smash hit songs.

McCartney says, “None of us did [read or write music] in the Beatles. We did some good stuff though. But none of it was written down by us. It’s basically notation. That’s the bit I can’t do. ‘Cause I don’t see music like that.

“I don’t see music as dots on a page. It’s something in my head that goes on.”

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McCartney’s candid chat also sees him open up about John Lennon’s fears, with him telling “60 Minutes” correspondent Sharyn Alfonsi: “I remember him once particularly strangely, out of the blue, saying, ‘I worry about how people are going to remember me.’

“And I was like, ‘John listen to me, look at me. You’re going to be remembered as one of the greatest people.'”

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However, McCartney does admit of his own insecurities: “I think if you care about what you’re doing, if you really want to get it right, then you’ve got to deal with insecurities.

“It’s what makes it right.”

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