Hayden Panettiere looks so pretty as she attends the red carpet at the fifth anniversary of Fashion Rocks at Radio City Music Hall in New York.  All proceeds from this event will go to Stand Up To Cancer.

Hayden has her hair extensions back in.  Do you like her better with long hair or short hair?

Some of the many celebs in attendance:  Fergie (pictured with) Will.i.am, Taboo, and Apl.de.Ap, Ashanti, Ciara, Beyonce (with better hair, thank you), Charlize Theron, Hillary Swank, Deborah Harry, Molly Sims, and Paula Abdul.

More pics after the jump

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