As Carrie Underwood hit the road with The Cry Pretty Tour 360 earlier this week, she also had two little boys in tow. Her four-year-old son Isaiah was only a baby when she was headlining her Storyteller trek, but now she’s also bringing along three-month old Jacob. She doesn’t know exactly what to expect, but she’s ready.

“It’s going to be interesting having both of them on the road,” she says. “The last time we were out on tour, Isaiah was 11 months old and perfectly content hanging out on the bus and this time, I feel like he’s going to be, I don’t know. He’ll either love it or be a holy terror to everyone [laughs], everyone else. You just figure out life and make up rules as you go along. That’s what we’re gonna keep doing.”

Carrie just released her new song, “Southbound,” which was the most added at country radio this week. The song is featured on her new Cry Pretty Tour 360. The trek is in Birmingham on Friday (May 3rd), followed by a show on Saturday (May 4th)  in Little Rock, Arkansas.