Carrie Underwood took to Twitter with exciting news on Monday: she's pregnant! The singer announced that she's expecting a baby with her husband, Mike Fisher, with a cute tweet, writing, "In honor of 'Labor' Day...Ace & Penny would like to make an announcement. Their parents couldn't be happier!" The snap shows Carrie sitting in a chair with her dogs, who don little outfits that say, "I'm going to be a big brother" and "I'm going to be a big sister." The pregnancy news comes just a couple months after they celebrated their fourth wedding anniversary. This will be the first child for Carrie and Mike. Congratulations to the happy couple!

Carrie's not the only star expecting — take a look at all the pregnant celebrities!