Kelly Clarkson is expecting a baby girl.

The "Since U Been Gone" singer confirmed she is having a daughter with husband Brandon Blackstock yesterday morning. "We just found out we're having a girl officially! I knew it! Only a girl could cause this much drama with all this vomiting ha! [sic]," she wrote on Twitter.

Kelly - who is four months pregnant - has previously tweeted about her battles with morning sickness, writing, "Ladies if you r pregnant & sick as a dog trust me when I say the one thing u will keep down might just be ''baked potatoes'' #godblesspotatoes [sic]."

"Didn't throw up once from pregnancy while walking my dogs #smallvictory #TMI [sic]," she also wrote alongside a picture of her dogs.

Kelly, 31, has also previously said she hopes her baby is "chunky" because she thinks it is cute: "I want chunky babies. I just love chunky babies. I want to bite their chunky arms and thighs. They're just so cute!"

Kelly and Brandon - who also has children Savannah, 12, and Seth, seven, from a previous relationship - have got some names in mind for their young one, but won't say whether they will be traditional or modern. "We're going with a little bit of both. We're keeping it in the family, but also doing something cool for us," she added.

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