Fifth Child on the Way for Zac Brown

"We're excited to share the news that Zac and Shelly are expecting a new baby in early 2014," the country star's rep tells PEOPLE.

Southern Reel

Looks like somebody is going to need a bigger tour bus — Zac Brown and his wife, Shelly, are expecting baby number five.

“We’re excited to share the news that Zac and Shelly are expecting a new baby in early 2014,” the country star’s rep tells PEOPLE.

“This will be the couple’s fifth child and will join big sisters Justice, 6; Lucy, 5; Georgia, 4; and Joni, 2.”

The pair also shared the good news on the Zac Brown Band’s Twitter feed.

“We’re just gonna keep on going until we get a boy,” the musician, 35, joked in 2011, after Joni was born.

Brown, who’s the 11th of 12 kids, added, “If that’s 13, then I doubt I’m gonna be able to pull that off, but we’ll see.”

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— KC Blumm