The talk show host also joked that she was "embarrassing" her kids, River, 11 and Remy, 9, who were in the audience.
A wardrobe malfunction that doesn't kill her makes her stronger.
Taking the stage for night two of her Las Vegas residency, Studio Sessions, Kelly Clarkson joked about her pasties sliding off mid-show.
In footage of the July 12 concert posted to TikTok, the "Since U Been Gone" singer, 43, warned (with humor) of the nipple covers under her T-shirt slipping off due to sweat.
"I'm like a Slip-n-Slide underneath," she said. "This might start sticking to me, and I'm not gonna lie, I have these like pasty things on under here. Because there's [an outfit] change coming and I can't have a line."
"You might all the sudden see boobs here," she continued, motioning towards her waist. "I am so hot. Is this the change? Is this the night that it starts happening?"
As she began introducing her next song, the American Idol alum stopped to alert fans that a potential nip slip would happen. "Oh my god, it's going to happen and then I'm going to do this for you," she said while shimmying her chest "and just really turn you on. Is anyone single? Looking? I'm just kidding." (Clarkson filed for divorce from music manager Brandon Blackstock in 2020, which was finalized two years later. The two were married for seven years before their split.)
The daytime talk show host also shouted out her two kids: daughter River, 11, and son Remington "Remy," 9.
"Y'all, I do have to say that I love that I'm probably embarrassing my kids. They're like, 'Stop talking.' I hope y'all have fun. I am completely going to embarrass you with things that I say -- you're welcome, it builds character."
Clarkson kicked off her residency, hosted at The Colosseum at Caesars Palace, on July 11 after postponing its Fourth of July start date due to "prep and rehearsals" taking a toll on her voice.
Following her announcement on Instagram, a source told PEOPLE that Clarkson "didn't want to cancel any shows," but had to in order to protect her vocal cords.
"She was devastated and felt terrible for fans that had traveled to see her," the source said. "She's been very excited about the Las Vegas residency and connecting with her fans."
Clarkson is no stranger to a style mishap, but she approached those moments with candor. Back in April, the Grammy winner recalled a time when she almost lost her bottoms.
"I had something happen on tour once where my skirt, the clip broke and it dropped, and I dropped so fast," she said in an episode of her show. "Look, long story short, I was commando. And I was like, it was a long skirt, and something happened to where it was like, 'Oh, okay.' "