Kristen and I were like, 'Oh my gosh, she could really do this.' She's a real-deal country singer, ... I think it even surprised Jenny a little.

I believe the biggest challenge is just getting the courage to try something different or new. Try to forget the stereotype in your mind. Yoga is for everyone - children, athletes, moms, dads, accountants, truck drivers, even country stars.

I try to spend a lot of time thinking of what it is I want to say, and how I want to say it. Mainly because I know what it's like as a fan to hear music that is just exactly what I needed.

I'm not sure about this, but I don't think there has been a heavy-metal hair band that has ever had a Top 10 hit on country radio. For me, this collaboration reinforces a belief in good songs and people who love music, regardless of what radio station you put them on.

I've tried to start my kids on 'Doctor Who,' but they're just not there yet. Someone had given me these TARDIS stick-em notes, so I gave them to Tucker, and he finally put them all over his locker. I'm like, 'You're the coolest fifth grader, ever!'

We worked hard for the past two years to make this happen. You have to be convinced that you're going to succeed. It takes focus, and we never believed that it would turn out any differently.