The American Idol victor is expecting her second child with husband Mike Fisher, 38.
Carrie Underwood says her family is adding "another fish to our pond".
Underwood was detailing her upcoming tour with fans when she noted that the reason for the May 2019 start date is because she is expecting.
The singer did not reveal how far along in her pregnancy she is or the sex of the child.
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Underwood and Fisher, a former National Hockey League player for Ottawa, Canada, and Nashville, Tennessee, have a 3-year-old son, Isaiah. "We're just so excited and glad you guys and can share in this and be a part of this with us". "We will see you on the road in 2019!"
Tickets for the tour go on sale Friday, Aug. 17 at 10 a.m.
For the Philadelphia show, Wells Fargo said the sale will begin at 10 a.m. August 17 exclusively through WellsFargoCenterPhilly.com, by phone at 1-800-298-4200, or in person at the Wells Fargo Center box office.
It's been quite a whirlwind of a year for Carrie.
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Bizarrely, the happy news comes just days after the singer lamented that she's left it too late to fulfill her dream of having more children.
"I'm 35, so we may have missed our chance to have a big family", she told the magazine.
"It's impossible for them not to", she shared.
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He cried talking to Becca's uncle Chuck, recalling relatives who had cancer while discussing the death of Becca's father. "You can imagine this trip could have been very hard for Lauren but she has supported and stood by me in all of this".