Oopsy. Not only did Kelly Clarkson lose her $150,000 custom Jonathan Arndt engagement ring over the weekend, she did so in the most public way possible: onstage at the CMA Music Festival in Nashville, Tenn., right after debuting artwork for a new single in which she's flashing the bauble. She noticed the yellow diamond was missing from her ring finger while performing "Stronger (What Doesn't Kill You)" and apologized multiple times to her fiance, Brandon Blackstock, who was backstage, according to Us. It seemed Clarkson may have misplaced the ring due to nerves, as she explained to CMT.com that she had been anxious all day ahead of her "first official set at a country thing." But once she had her big country debut in the bag -- a tie-in to the release of her first country single, "Tie It Up" -- the ring was recovered. "For all of the concerned fans, I found my rings!" she tweeted on Sunday. "Seriously, panicked in my head all night long … so did Brandon!"