Tim McGraw & Faith Hill's Soul 2 Soul Tour: "A Family Affair"

Power couple Tim McGraw and Faith Hill are getting ready to reprise their successful Soul 2 Soul tour in Australia next month. The country superstars - who are parents to daughters Gracie, 14, Maggie, 13, and Audrey, 10 - told Good Morning America Thursday that it will be a "family affair."

"They're very excited about going," Tim said of their daughters joining them on the road. "Last year we had a good time. We're there a little longer this time than we were last year. When [Faith] goes with me, they want to see more shows. When I'm by myself, there's only like two shows. When she goes with me, we sell more tickets so we have to do more shows."

When asked if he'd support his daughters if they wanted to have a music career outside of the country genre, Tim replied, "Whatever they do, I want it to be good because it's just such a tough business."

He continued by saying a good education and a happy life are top priorities in the Hill-McGraw household.

But like anybody's kids, you want them to get educated and have a great, successful and happy life," the proud papa said. "We just encourage them to do what they want to do, and do it well no matter what it is."

While Faith agreed, Tim added, "But I'd like them to have a Ph.D." associated with their names. At that, Faith joked, "A Ph.D. and a member of the Grand Ole Opry."

And what about a joint CD one day for the superstar couple?

I'm sure that we will at some point eventually," Faith said. "We're together all the time and we have great ideas about what we'd like to do. But eventually."