Carrie Underwood is going to have a baby!

Carrie Underwood picked Labor Day, of all days, to announce that she and her husband Mike Fisher are expecting their first child. How did she 'pop the news' to the world? According to ABC News, Carrie posted on Twitter a photo of herself holding her two dogs, Ace and Penny wearing shirts. The caption reads, "In honor of 'Labor' Day...Ace & Penny would like to make an announcement. Their parents couldn't be happier!"  Ace is sporting a t-shirt that reads "I'm gonna be a big brother," while Penny is wearing one that reads "I'm gonna be a big sister."