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"I am so thankful," the 26-year-old singer, who is due to give birth in July, tells Broadway's Electric Barnyard. "I wake up every day and think about the women that have to have ziplocs in their cars, they're so sick. I thank God every day that I have not had to deal with that. Fatigue has been my toughest obstacle."
The soon-to-be parents still don't know the sex of their baby, which is causing a bit of a name game. "If it's a boy, there aren't very many girl names that could be boy names. But if it's a girl, there's a bunch of boy names on the list that could technically be girl names. I'm hoping I can at least cut it down somewhat, because there's a lot of names to choose from and a lot of really cute ones and family names that are important to us. So, it's a tough decision."
Whether it's a boy or a girl, the baby is getting an early start on a recording career. Lady Antebellum plans on including the sound of the infant's heartbeat on one of the tracks on their upcoming album. "That's definitely something we're going to try to capture, and it was Charles' [Kelley] idea," Hillary reveals. "I walked into the studio and we had just had the doctor's appointment and I was like, 'Here's the heartbeat, it's beating 158, really strong and fast.' And he goes, 'We have to do something with that!' And we have this song on our record that's really sweet and special to us. It was the last song we wrote for the record, and it could be about a love relationship or it could be truly for a parent to a child, as well, so he was like, 'That would be such a cool way to start that song.' It hasn't happened yet, but I'm hoping."
There's no word yet on when the new album will hit shelves. Its debut single, "Downtown," marks the trio's highest chart debut of their career. Listen to the song in the video player below.