John, Paul, George, Ringo ... and Hillary?

She may not be the fifth Beatle, but during her "angst"-ridden days as a bookish student at Wellesley College, Hillary Clinton says she turned to the Fab Four for more than just music.

"As I went through my angst period and struggled with the challenges of living in the real world, the more existential message struck home," Clinton told FOX News' James Rosen in an exclusive and wide-ranging interview.

Pausing from a discussion of North Korean nuclear ambitions and troop deployments in Afghanistan, the secretary of state told FOX News that she though John Lennon and Paul McCartney "were geniuses. And I'm just glad I got to live through that period," she said.

RELATED: Click here to see a full transcript of the interview with FOX News' James Rosen.

Though moved especially by what Rosen called the "world-weary, drug-fueled existentialism of their later work," the Secretary of State says she has always approved of the British Invasion.

"Well, like so many Beatles fans, it depends both on mood and stage of life. I have to confess ... that the hand-clapping mode was what I first was captured by. 'I Want to Hold Your Hand' was an anthem, as you might imagine."

Clinton named "Hey Jude" as her favorite Beatles song, praising its Biblical tone and seriousness — but she might have trouble heeding some of its "existential" lessons.

As the 67th Secretary of state continues her first trip abroad, following Paul McCartney's advice — "Don't carry the world upon your shoulders" — might be a little harder than it sounds.