Kelly Clarkson's 'Mr. Know It All' Premieres

6:25 AM PDT 9/26/2011 by Lindsay Powers

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The "American Idol" winner performed her newest single at the iHeartRadio music festival over the weekend.

Ethan Miller/Getty Images

Hot off her performance at the weekend's iHeartRadio music festival, Kelly Clarkson has released her new video for single "Mr. Know It All."

The song will be her first single from Clarkson's next studio album, Stronger, which hits stores on Oct. 24.

The Season 1 American Idol winner has said of the concept: "The whole point of the song that I like is 'you don't know a thing about me.' I love that concept because it's ignorant to think you know everything about a person. There's many sides to everybody's personality. We're kind of doing a variety of different Kellys.” Watch below.

Clarkson, Lady Gaga and Jennifer Lopez were among those who graced the stage at the Ryan Seacrest-produced iHeartRadio festival, held at the MGM Grand in Las Vegas.