Congratulations to Carrie Underwood and Mike Fisher who revealed on Twitter today (Labor Day) they're expecting their first child. Carrie dressed her dogs Ace and Penny in matching "big brother" and "big sister" doggie T-shirts for the announcement.

Carrie tweeted, "In honor of 'Labor' Day … Ace and Penny would like to make an announcement. Their parents couldn't be happier!"

Brad Paisley was among the first country stars to congratulate the expectant parents.

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