Brandon Blackstock, Kelly Clarkson Brandon Blackstock, Kelly Clarkson

Kelly Clarkson is officially off the market.

The singer posted on Twitter Monday that she married her fiancée Brandon Blackstock over the weekend. "I'm officially Mrs. Blackstock :) We got married yesterday at Blackberry Farms in TN, the most beautiful place ever!" she wrote, along with a picture of the couple.

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The ceremony took place in front of a small group of friends and family, E! Online reports.

Clarkson had previously said that Blake Shelton was going to officiate their wedding; however, it's unclear whether he actually performed the ceremony.

The former American Idol winner announced her engagement to Blackstock last December. Blackstock has two children from a previous marriage.