The American Idol winner walked down the aisle in Temperley Bridal's "Jessamine" dress from the Iris collection and complemented the look with with a Maria Elena Headpieces headband and a bouquet of sunflowers and Bluebonnets.
Blackstock's two children, Savannah, 11, and Seth, 7, were among the few attendees at the intimate wedding. Clarkson previously told E! News that she and Blackstock were "gonna go off with the kids and go get married."
"It's just gonna be literally, seriously small," she said at the time.
On Monday, the new Mrs. Blackstock shared a few pictures from the wedding on Twitter.
I'm officially Mrs. Blackstock :) We got married yesterday at Blackberry Farms in TN, the most beautiful place ever! pic.twitter.com/vYYqopBAcr— Kelly Clarkson (@kelly_clarkson) October 21, 2013
Another picture from our wedding :) pic.twitter.com/3YS2WjIpOD— Kelly Clarkson (@kelly_clarkson) October 21, 2013
The couple met in 2006 during rehearsals for the American Country Music Awards. They began dating six years later and got engaged in December 2012.