Then again, she was taping a Christmas TV special.
The former American Idol winner took the stage at the Las Vegas Venetian Wednesday night, belting out songs from her Wrapped in Red album, along with a few of her greatest hits.
At one point Clarkson spoke about how attractive an audience member was. When some shouted out that she was a newly married woman, the singer replied good-naturally, “I will hit on someone and make him jealous I’m just kidding, I love my man.”
Her special, which airs Dec. 11 on NBC, features country stars Blake Shelton, Trisha Yearwood and Reba McEntire.
“I’ve been trying to make a Christmas album since I was a kid,” she told the crowd.
Wearing no shoes for the second half of her show – the greatest hits’ portion – Clarkson sang a number of songs, and at one point did the "lawnmower" dance move with a fan.
“We look good. That’s how I got my man,” she joked.