She may be married to a country star, but Brittany Kerr is about to "pop." That's what Jason Aldean's pregnant wife wrote alongside a selfie on Sunday while showing off her huge baby bump in the bathroom mirror. "Bumpdate: About to pop (37 weeks)," the 30-year-old Brittany Kerr captioned the snap. Us Weekly notes that earlier this month, the 41-year-old Aldean likewise said in an interview, "My wife is about to pop any second." The couple revealed in November that they are expecting a daughter they plan to name Navy Rome. She'll join 1-year-old big brother Memphis, as well as Aldean's two older daughters from his previous marriage.