Jo Dee Messina and her husband Chris Deffenbaugh welcomed their second son on Wednesday afternoon (Jan. 11) in Nashville. They named him Jonah Christopher Deffenbaugh. He weighed 6 pounds, 13 ounces. Messina and Deffenbaugh's first child, Noah, is 3 years old. "Noah couldn't wait to hold his little brother. He's so good with him. God has blessed us so much," Messina said. Messina announced her latest pregnancy on Twitter in October. She and Deffenbaugh married in 2007.