The 'My Life Would Suck Without You' singer confirmed her nuptials to talent agent Brandon via Twitter on Monday afternoon (21 October) and gave fans a glimpse at her gorgeous white lace wedding gown.
Kelly tweeted two pictures from her wedding, adding the caption: "I'm officially Mrs Blackstock. We got married yesterday at Blackberry Farms in TN, the most beautiful place ever!"
Blackberry Farms is a luxury hotel set in a 4,200-acre estate in the Great Smoky Mountains.
Kelly and Brandon became engaged in December 2012, with Kelly tweeting at the time: "Happiest night of my life last night! I am so lucky and am with the greatest man ever!"
Brandon - who is the son of Kelly's manager - presented his now-wife with a whopping yellow canary diamond ring when he popped the question.
Kelly and Brandon filed for their marriage license in Nashville earlier this month, prompting speculation a wedding date was imminent.
The couple had initially decided to throw a large wedding but later decided to elope after becoming overwhelmed with wedding planning. Kelly told People magazine at the time: "Our lives are so in the spotlight all the time. Everything is such a spectacle, we were like, 'We would rather have an intimate moment that's special.' "
In October this year, Kelly admitted she was eager to start a family with Brandon as soon as they married, saying: "I want babies like right off the bat!"
She added to the Elvis Duran and the Morning Show: "I'm totally gonna have a girl. My first child will be a girl - I know it in my soul."
Congrats to Kelly and Brandon!