Kelly Clarkson announces birth of daughter River Rose Blackstock

In this Sept. 22, 2011 file photo, musician

In this Sept. 22, 2011 file photo, musician Kelly Clarkson poses for a portrait in Los Angeles. (Credit: AP / Matt Sayles)

Kelly Clarkson has something to sing about: She's celebrating the birth of her first child.

The Grammy winner announced the arrival of her daughter, named River Rose Blackstock, in a Saturday post on Twitter.

She says the baby arrived on June 12, and she and her husband are "on cloud 9."

Her rep confirmed the tweet.

The 32-year-old singer, known for hits like "Stronger" and "Since U Been Gone," married music manager Brandon Blackstock last year.

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