Inspiration can pop up at any time, whether you're about to fall asleep, taking a shower or even driving a car.

That's exactly what happened to musician Paul McCartney in 1968, who was driving his Aston Martin DB6 to visit John Lennon's son, Julian, when the inspiration to write a new song struck the legendary Beatle.

Since Paul was smart enough to get rid of the glove-box in the car for a reel-to-reel tape recorder, he was able to turn his "Goodwood Green" sedan into a recording studio, all with the flick of a switch, according to CNN Money.

As it was, the session turned out to be an early demo of "Hey Jude," which is considered by many to be among the greatest songs of all-time.

The 7-minute song, which was originally intended to be called "Hey Jules," was McCartney's way of trying to help Julian deal with the divorce of his parents, John and Cynthia Lennon.

While the Beatles had plenty of other hit songs, who knows if "Hey Jude" would have ever been released if it wasn't for that one drive.

The 282-hp vehicle was purchased at an auction by Aston Martin in 2001 and is still in good condition today, though it doesn't run on the same 4.0-liter 6-cylinder engine and five-speed transmission anymore, according to CNN.

The automaker's restoration shop, Aston Martin Works, replaced the engine with a 4.2-liter while adding electric power steering to "make parking easier."

Unfortunately, Aston Martin also removed the famous tape recorder "for its own protection," so no other classics will be recorded in the DB6.

Car collectors are also out of luck, as the ride will also probably never reach the auction block again since the U.K. automaker swore to CNN it has no intention to sell Paul's old set of wheels.

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