"She's such a great mother," Kelley told Radio.com during a chat on the ACM Honors red carpet. "We've gone over to her house a bunch. We've been writing some songs and preparing for the tour. It's been fun for Dave and I to go over there. We're working, but then we're also watching her be a mother. She's really great at it. So it's been a fun experience, but she'll be ready soon."

The "Goodbye Town" singers will experience another first when they begin touring again this fall � no longer all bunking together on the same bus. Scott and her husband, Lady A drummer Chris Tyrrell, will get their own home on wheels. Otherwise, Kelley maintains very little about the band will change.

"Hillary was a touring baby herself, so I think she knows what to expect, hopefully," he noted. "I'm sure there's going to be challenges, but she's going to have a lot of help. Dave and I are going to help as much as we can. She's really resilient. Trust me, I have a bunch of nieces and nephews. I can change a diaper. I am not scared of a diaper."