KEITH'S SHOCK TELL-ALL 'I'M MISERABLE?

So soon after splitting with Nicole, is the country star already having second thoughts?

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There's a saying that the grass is always greener on the other side, but a few months after supposedly instigating his split from Nicole Kidman, Keith Urban might be finding life as a bachelor isn't all it's cracked up to be.

In a telling new chat about the often “lonely” and “miserable” life of a touring artist, Keith, 57, laments all the sacrifices it takes to be a success, including being away from your family for weeks on end.

An insider tells Woman's Day that the reality of losing his wife of 19 years is starting to dawn on him.

"There are moments, especially those long nights alone on the road, when he worries he's making a big mistake," the source says. "This is the woman who saved his life, who he has two beautiful girls with, who loved him with everything.”

BIG REGRETS?

Keith made the candid confessions while filming his new show The Road, which follows 12 emerging artists as they compete to be his opening act on tour.