Wladimir Klitschko must be glad he put a ring on it because Hayden Panettiere is on fire.

The actress attended the Jony & Marc's (Red) Auction at Sotheby's New York yesterday (Nov. 23) to benefit The Global Fund to fight AIDS, and she looked stunning doing it.

Panettiere walked the red carpet in a black cutout dress that showcased her side tattoo and her megawatt smile.

Tonight, the 24-year-old will surely wow in another stylish number as a presenter at the 2013 American Music Awards, where Taylor Swift, Dave Grohl and Emma Roberts are set to present awards as well.

hayden panettiere

hayden panettiere

hayden panettiere

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