A spokeswoman for the Zac Brown Band front man tells The Associated Press that Shelly Brown delivered Joni Mason Brown Wednesday morning at the couple's Atlanta-area home.
The baby weighs 7 pounds, 14 ounces. She joins three sisters: 4-year-old Justice, 2-year-old Lucy and 1-year-old Georgia.
The Grammy-winning band is up for four Grammy Awards again later this month and just received five Academy of Country Music Awards nominations as a band. Brown got four nominations as a producer and composer.
After a short winter hiatus, the band hits the road again in March.
Brown said in a recent interview that he hardly has time to pick up his guitar when at home because of diaper duty.