Kelly Clarkson rocks out at performance in Orange County Fair

Kelly Clarkson rocks out during a live performance at the Orange County Fair in Costa Mesa, California.

Kelly Clarkson rocks out during a live performance at the Orange County Fair in Costa Mesa, California.

The 27-year-old American Idol Season 1 winner wore a David Bowie t-shirt and sung her heart out during some fist-pumping, power pop ballads for the enthusiastic crowd at the Pacific Amphitheatre.

Kelly has come back with a vengeance after being out of the spotlight for about two years.

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