Justin Moore has a son! The singer and his wife, Kate, opted not to find out the sex of their fourth child, so it was an extra special surprise when they welcomed a baby boy on Sunday (June 11). The couple already has three daughters.

Thomas South Moore was born at 3:33PM in Little Rock, Ark., People reports. He's named after the singer's late grandfather, and the family will call him South. Baby weighed 7 lbs., 14 oz. and was 20 inches long at birth. He was welcomed by Mom, Dad and older sisters Ella Kole, 7, Kennedy Faye, 5, and Rebecca Klein, who is almost 3.

"Kate and I already felt like the most blessed people in the world with our three beautiful daughters, but we feel even more blessed to have a healthy baby boy now to add to our family,” Moore tells the magazine. "God has given us another wonderful gift, in him, June 11."

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“His sisters are already obsessed with him, as we are all of them,” he adds of South's warm welcome. "Thanks for all the well wishes and congratulations. Very much appreciated."

It's a good thing that baby No. 4 is a boy, because Moore's girls weren't too keen on the idea of another sister. "If anything, they’ve hardened even more,” the star told Taste of Country earlier this year. "I don’t know that my oldest [Ella] won’t move out if she has another sister."

Moore is adamant that he's done having kids now — in fact, he was "done with three girls" — but his wife wanted a son, so they tried for another. "And so she worked on me for about a year," he explains, joking, So, she finally got me drunk and took advantage of me."

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