Carrie Underwood is expecting a boy!

The singer's CMA's co-host, Brad Paisley, let the news slip during their monologue at tonight's awards show.

"What are you doing?!" Underwood exclaimed, to the crowd's applause. "What is wrong with you?!… Well, you kept that a secret for a whole two minutes."

Paisley responded, "Hashtag, Brad blew it."

Underwood, 31, announced in September that she and her hockey player husband, Mike Fisher, were expecting their first baby next year.

(Photo credit: Larry Busacca/Getty Images)