Zac Brown said recently he hardly has time to pick up a guitar around his house because he’s so tied up with diaper duty.

More duty calls—Zac and Shelly Brown welcomed their fourth child yesterday (Feb. 2). Lil’ Joni Mason Brown was 7 pounds, 14 ounces, a Zac Brown Band spokeswoman tells the Associated Press.

Zac’s other children are 4, 2 and 1.

It has been a good week for Zac—he received nine ACM nominations as well.