Oh baby! Stars who are expecting

Carrie Underwood <a href='https://twitter.com/carrieunderwood' target='_blank'>tweeted</a> on Monday, September 1, "In honor of "Labor" Day...Ace &amp; Penny would like to make an announcement. Their parents couldn't be happier!" Find out who else is expecting:

Carrie Underwood tweeted on Monday, September 1, "In honor of "Labor" Day...Ace & Penny would like to make an announcement. Their parents couldn't be happier!" Find out who else is expecting: