Along with her twin sister Kristina, blonde babe Karissa Shannon rocketed to fame overnight when Playboy founder and octogenarian reality-TV star Hugh Hefner picked them to replace departing girlfriends Bridget Marquardt and Kendra Wilkinson in his harem and on his show The Girls Next Door. Karissa also bared her 34B-26-34 body as Miss July of 2009. What better way to celebrate Skin-dependence Day?