Tim McGraw doesn't want to "give away too much" about the Soul 2 Soul II tour with wife Faith Hill that kicks off April 21 in Columbus, Ohio.

Tim McGraw doesn't want to "give away too much" about the Soul 2 Soul II tour with wife Faith Hill that kicks off April 21 in Columbus, Ohio. But he says that "on paper it's come out exactly like we planned it and drew out when we had our first meetings together."

In a conference call with reporters, McGraw described a "seamless" in-the-round concert that will last nearly three hours and feature the two singers -- who will each carry separate bands -- performing on their own and together. "From the time the lights go down 'til the time the lights come up it's consistently one show, and it's going to be a different structure than anybody's ever seen before," McGraw said.

McGraw said that he and Hill spent "a lot of time" talking about the design of the set and the concerts. He's particularly looking forward to the in-the-round setting, which will place them in the center of the arenas they're playing. "It's different for us, but I think it's going to come naturally 'cause we've been thinking about it for a long time," he said. "I think it's all worked out in our heads; it's a matter of transferring it from our heads to the stage."

Repertoire, he said, has been another challenge. "Gosh, there's so many songs that aren't going to be involved in the show," he said. "She's recorded, what, six or seven albums? I've got 10 albums out now. There's no way to get even all the songs that [are] on the radio in the show."

The 71-date Soul 2 Soul II marks the third time McGraw and Hill have toured together. They were part of a George Strait stadium tour in 1996 and staged the first Soul 2 Soul outing in 2000.

"We really want to make sure that people feel like they got their money's worth out of the show they see," McGraw said.