The Since You've Been Gone singer beamed as she performed her single Catch My Breath.
Over the weekend the 30-year-old star announced her engagement to 35-year-old talent manager Brandon Birkenstock.
"I'm engaged!! Kelly tweeted. "I wanted y'all to know! Happiest night of my life! I am so lucky and am with the greatest man ever."
The former American Idol winner posted a photo of her knock-out canary yellow diamond ring shortly after.
While other stars and celebrities were quick to congratulate her, our own Bressie was less gracious.
"Sweet Jesus, Kelly Clarkson is engaged," he wrote. "Finally she may give us some tunes with subject matter other than how all men are b*******."