The country singer - who has a two-year-old daughter, Sunday Rose, with the Oscar-winning actress - says Nicole is his ideal partner because they both have the same values in life.
He said: "I'm fortunate to have a wife who understands about career as well. We're very blessed to have each other, and you recognise the importance of all the facets of our lives. But family is very, very strong in our lives."
While Keith enjoys his music career, he says his family will always be his priority.
Talking about maintaining a balance between work and family, Keith told Parade.com: "I don't know if there's any secret to it. Everybody sort of finds their own way to keep their life balanced. I know for me, family is first and I just make sure that I spread my time amongst the things that I love to do as well. Balance is never achieved, it's just maintained. And so far I've been able to maintain it."
As well as being dedicated parents to little Sunday, Keith and Nicole also take it turns to cook.
He said: "At home, I do a little bit of cooking. My wife and I share the cooking duties a little bit."
After having a music career that spanned five decades and saw the release of over...