Keith Urban complained about being “lonely and miserable” while on tour before he and Nicole Kidman called it quits on their 19-year marriage.

The country music star reflected on the hardships of touring in an upcoming episode of his competition series, “The Road,” according to the Daily Mail.

“Where do we start?” Urban, 57, asks in the episode, which premieres on Oct. 19. “It’s a calling, and you’re going to do it or you’re not going to make it.”

The “You’ll Think of Me” singer explains that the show must always go on — regardless of how he’s feeling.

He reflects, “When you wake up on a tour bus at 3:30 in the morning and you’re sick as a dog, you’re in the middle of nowhere and you’ve got to play your fifth show later that night, and you haven’t slept, and you miss your friends, an

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