It will be five years this June since the beautiful Sara Jean Underwood gained worldwide fame by becoming Playb*y's Bunny of the Year. After her nude modeling she has appeared in minor roles on television shows and movies. Her big break came In 2009 when she co-hosted five episodes of G4's "Attack of the Show," filling in for the also ravishing Olivia Munn, who was on vacation. Since then she has garnered a massive internet following thanks to her exceptionally sexy cosplay that was featured on "Attack of the Show," making her an instant sensation with geeks everywhere. Today the scintillating Sara Jean Underwood turns 28-years-old and to celebrate we present to you her 60 hottest photos.